Fixing AnkiHub deck download errors on Anki

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1

I am facing a problem downloading Dermki anki deck due to an error that appears:Anki 25.09.2 (3890e12c) (ao)

Python 3.13.5 Qt 6.9.1 PyQt 6.9.1

Platform: Windows-11-10.0.26100-SP0

Traceback (most recent call last):

File “C:\Users\ansid\AppData\Roaming\Anki2\addons21\1322529746\ankihub_client\ankihub_client.py”, line 320, in _send_request_with_retry

return send_with_retry()

File “C:\Users\ansid\AppData\Roaming\Anki2\addons21\1322529746\lib\tenacity\_init_.py”, line 289, in wrapped_f

return self(f, *args, **kw)

File “C:\Users\ansid\AppData\Roaming\Anki2\addons21\1322529746\lib\tenacity\_init_.py”, line 379, in _call_

do = self.iter(retry_state=retry_state)

File “C:\Users\ansid\AppData\Roaming\Anki2\addons21\1322529746\lib\tenacity\_init_.py”, line 326, in iter

raise retry_exc from fut.exception()

tenacity.RetryError: RetryError[<Future at 0x24a95b15350 state=finished raised ConnectionError>]

During handling of the above exception, another exception occurred:

Traceback (most recent call last):

File “C:\Users\ansid\AppData\Roaming\Anki2\addons21\1322529746\ankihub_client\ankihub_client.py”, line 324, in _send_request_with_retry

response = last_attempt.result()

File “C:\Users\ansid\AppData\Local\AnkiProgramFiles\python\cpython-3.13.5-windows-x86_64-none\Lib\concurrent\futures\_base.py”, line 449, in result

return self.__get_result()

~~~~~~~~~~~~~~~~~^^

File “C:\Users\ansid\AppData\Local\AnkiProgramFiles\python\cpython-3.13.5-windows-x86_64-none\Lib\concurrent\futures\_base.py”, line 401, in __get_result

raise self._exception

File “C:\Users\ansid\AppData\Roaming\Anki2\addons21\1322529746\lib\tenacity\_init_.py”, line 382, in _call_

result = fn(*args, **kwargs)

File “C:\Users\ansid\AppData\Roaming\Anki2\addons21\1322529746\ankihub_client\ankihub_client.py”, line 317, in send_with_retry

return self.thread_local_session.get().send(request, stream=stream, timeout=timeout)

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File “C:\Users\ansid\AppData\Local\AnkiProgramFiles\.venv\Lib\site-packages\requests\sessions.py”, line 703, in send

r = adapter.send(request, **kwargs)

File “C:\Users\ansid\AppData\Local\AnkiProgramFiles\.venv\Lib\site-packages\requests\adapters.py”, line 700, in send

raise ConnectionError(e, request=request)

requests.exceptions.ConnectionError: HTTPSConnectionPool(host=‘ankihub.s3.amazonaws.com’, port=443): Max retries exceeded with url: /deck_271bd550-5bfd-44a1-bfbd-df1878c33b5f_notes.csv.gz?response-content-disposition=attachment&AWSAccessKeyId=AKIASSGURO7AU2A7QZOX&Signature=KIzFicnZGxV0bTg1fQsz7uk4goQ%3D&Expires=1778910588 (Caused by NameResolutionError(“<urllib3.connection.HTTPSConnection object at 0x0000024A95AB74D0>: Failed to resolve ‘ankihub.s3.amazonaws.com’ ([Errno 11001] getaddrinfo failed)”))

The above exception was the direct cause of the following exception:

Traceback (most recent call last):

File “C:\Users\ansid\AppData\Roaming\Anki2\addons21\1322529746\gui\operations\deck_installation.py”, line 201, in _download_and_install_decks_inner

_download_and_install_single_deck(

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^

deck,

^^^^^

behavior_on_remote_note_deleted=behavior_on_remote_note_deleted,

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

recommended_deck_settings=recommended_deck_settings,

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

)

^

File “C:\Users\ansid\AppData\Roaming\Anki2\addons21\1322529746\gui\operations\deck_installation.py”, line 228, in _download_and_install_single_deck

notes_data: List[NoteInfo] = AnkiHubClient().download_deck(

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^

deck.ah_did, download_progress_cb=deck_download_progress_cb

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

)

^

File “C:\Users\ansid\AppData\Roaming\Anki2\addons21\1322529746\ankihub_client\ankihub_client.py”, line 672, in download_deck

s3_response_content = self._download_with_progress_cb(s3_url_suffix, download_progress_cb)

File “C:\Users\ansid\AppData\Roaming\Anki2\addons21\1322529746\ankihub_client\ankihub_client.py”, line 694, in _download_with_progress_cb

with self._send_request(“GET”, API.S3, s3_url_suffix, stream=True, is_long_running=True) as response:

~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File “C:\Users\ansid\AppData\Roaming\Anki2\addons21\1322529746\ankihub_client\ankihub_client.py”, line 283, in _send_request

return self._send_request_with_retry(

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^

prepped,

^^^^^^^^

…<2 lines>…

is_long_running=is_long_running,

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

)

^

File “C:\Users\ansid\AppData\Roaming\Anki2\addons21\1322529746\ankihub_client\ankihub_client.py”, line 326, in _send_request_with_retry

raise AnkiHubRequestException(e) from e

1322529746.ankihub_client.ankihub_client.AnkiHubRequestException: AnkiHub request exception: HTTPSConnectionPool(host=‘ankihub.s3.amazonaws.com’, port=443): Max retries exceeded with url: /deck_271bd550-5bfd-44a1-bfbd-df1878c33b5f_notes.csv.gz?response-content-disposition=attachment&AWSAccessKeyId=AKIASSGURO7AU2A7QZOX&Signature=KIzFicnZGxV0bTg1fQsz7uk4goQ%3D&Expires=1778910588 (Caused by NameResolutionError(“<urllib3.connection.HTTPSConnection object at 0x0000024A95AB74D0>: Failed to resolve ‘ankihub.s3.amazonaws.com’ ([Errno 11001] getaddrinfo failed)”))

The above exception was the direct cause of the following exception:

Traceback (most recent call last):

File “C:\Users\ansid\AppData\Local\AnkiProgramFiles\.venv\Lib\site-packages\aqt\taskman.py”, line 152, in raise_exception

raise exception

File “C:\Users\ansid\AppData\Local\AnkiProgramFiles\.venv\Lib\site-packages\aqt\taskman.py”, line 148, in _on_closures_pending

closure()

~~~~~~~^^

File “C:\Users\ansid\AppData\Roaming\Anki2\addons21\1322529746\gui\auto_sync.py”, line 100, in sync_with_ankiweb

future.result()

~~~~~~~~~~~~~^^

File “C:\Users\ansid\AppData\Local\AnkiProgramFiles\python\cpython-3.13.5-windows-x86_64-none\Lib\concurrent\futures\_base.py”, line 449, in result

return self.__get_result()

~~~~~~~~~~~~~~~~~^^

File “C:\Users\ansid\AppData\Local\AnkiProgramFiles\python\cpython-3.13.5-windows-x86_64-none\Lib\concurrent\futures\_base.py”, line 401, in __get_result

raise self._exception

File “C:\Users\ansid\AppData\Roaming\Anki2\addons21\1322529746\gui\operations\utils.py”, line 36, in wrapper

return func(*args, **kwargs)

File “C:\Users\ansid\AppData\Roaming\Anki2\addons21\1322529746\gui\operations\ankihub_sync.py”, line 146, in _on_new_deck_subscriptions_done

future.result()

~~~~~~~~~~~~~^^

File “C:\Users\ansid\AppData\Local\AnkiProgramFiles\python\cpython-3.13.5-windows-x86_64-none\Lib\concurrent\futures\_base.py”, line 449, in result

return self.__get_result()

~~~~~~~~~~~~~~~~~^^

File “C:\Users\ansid\AppData\Local\AnkiProgramFiles\python\cpython-3.13.5-windows-x86_64-none\Lib\concurrent\futures\_base.py”, line 401, in __get_result

raise self._exception

File “C:\Users\ansid\AppData\Roaming\Anki2\addons21\1322529746\gui\operations\utils.py”, line 36, in wrapper

return func(*args, **kwargs)

File “C:\Users\ansid\AppData\Roaming\Anki2\addons21\1322529746\gui\operations\deck_installation.py”, line 97, in _on_install_done

import_results: List[AnkiHubImportResult] = future.result()

~~~~~~~~~~~~~^^

File “C:\Users\ansid\AppData\Local\AnkiProgramFiles\python\cpython-3.13.5-windows-x86_64-none\Lib\concurrent\futures\_base.py”, line 449, in result

return self.__get_result()

~~~~~~~~~~~~~~~~~^^

File “C:\Users\ansid\AppData\Local\AnkiProgramFiles\python\cpython-3.13.5-windows-x86_64-none\Lib\concurrent\futures\_base.py”, line 401, in __get_result

raise self._exception

File “C:\Users\ansid\AppData\Local\AnkiProgramFiles\python\cpython-3.13.5-windows-x86_64-none\Lib\concurrent\futures\thread.py”, line 59, in run

result = self.fn(*self.args, **self.kwargs)

File “C:\Users\ansid\AppData\Roaming\Anki2\addons21\1322529746\gui\operations\deck_installation.py”, line 81, in

task=lambda: _download_and_install_decks_inner(

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^

decks,

^^^^^^

behavior_on_remote_note_deleted=behavior_on_remote_note_deleted,

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

recommended_deck_settings=recommended_deck_settings,

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

),

^

File “C:\Users\ansid\AppData\Roaming\Anki2\addons21\1322529746\gui\operations\deck_installation.py”, line 218, in _download_and_install_decks_inner

raise exceptions[0]

1322529746.gui.exceptions.DeckDownloadAndInstallError: Error while downloading and installing deck 271bd550-5bfd-44a1-bfbd-df1878c33b5f: AnkiHub request exception: HTTPSConnectionPool(host=‘ankihub.s3.amazonaws.com’, port=443): Max retries exceeded with url: /deck_271bd550-5bfd-44a1-bfbd-df1878c33b5f_notes.csv.gz?response-content-disposition=attachment&AWSAccessKeyId=AKIASSGURO7AU2A7QZOX&Signature=KIzFicnZGxV0bTg1fQsz7uk4goQ%3D&Expires=1778910588 (Caused by NameResolutionError(“<urllib3.connection.HTTPSConnection object at 0x0000024A95AB74D0>: Failed to resolve ‘ankihub.s3.amazonaws.com’ ([Errno 11001] getaddrinfo failed)”))

2

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CleanShot 2024-09-29 at 08.56.43@2x2118×1412 423 KB

3
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Thanks for sharing the full error log — that’s very helpful.

The key part is:

Failed to resolve 'ankihub.s3.amazonaws.com' ([Errno 11001] getaddrinfo failed)

This means AnkiHub can’t reach Amazon S3 from your computer. That’s almost always a local network / DNS / security software issue, not a problem with your AnkiHub account or the deck itself.

Please try these steps in order:

1. Check if your system can reach the file server

  1. Open a browser on the same computer.
  2. Go to:
    https://ankihub.s3.amazonaws.com
  3. Possible outcomes:
    • If the page loads or shows an XML / AccessDenied-style message, that’s good: the site is reachable.
    • If it doesn’t load / times out / says DNS error, something on your system or network is blocking access.

If it does not load, continue with steps 2–4 below.

2. Check VPN / firewall / antivirus

On Windows, these often interfere with S3:

  1. Turn off VPN (if you’re using one) and try the AnkiHub sync again.
  2. Temporarily disable third‑party antivirus / security suites (e.g., Kaspersky, Bitdefender, etc.), then:
    • Restart Anki
    • Try downloading the Dermki deck again.
  3. Make sure Windows Defender Firewall or your security software isn’t blocking Anki:
    • Open Windows Security → Firewall & network protection → Allow an app through firewall
    • Ensure Anki is allowed on Private (and Public if needed).

3. Try a different network / DNS

Sometimes the issue is your router or ISP’s DNS:

  1. Connect your computer to a different network:
    • For example, use your phone’s mobile hotspot instead of home Wi‑Fi.
  2. Or temporarily change DNS:
    • Open Control Panel → Network and Internet → Network and Sharing Center → Change adapter settings
    • Right‑click your active network → Properties
    • Select Internet Protocol Version 4 (TCP/IPv4) → Properties
    • Set DNS to:
      • Preferred: 8.8.8.8
      • Alternate: 1.1.1.1
    • Click OK, then restart Anki and retry.

If switching networks works, the issue is with your original network’s DNS or firewall.

4. Confirm Anki & AnkiHub add‑on are current

  1. Make sure you’re on the latest stable Anki version from the official site.
  2. In Anki: Tools → Add-ons → AnkiHub → Check for Updates (or reinstall the latest AnkiHub add‑on from the official link on AnkiWeb / AnkiHub docs).
  3. Restart Anki and try downloading Dermki again.

5. If it still fails

Please reply in your topic with:

  • Whether https://ankihub.s3.amazonaws.com loads in your browser
  • Whether a different network (e.g., phone hotspot) works
  • A screenshot or copy of any error message you see in the browser

With that info, the AnkiHub team can better tell if it’s definitely a local network block vs. something else, and help you further.

4

upon opening the website : https://ankihub.s3.amazonaws.com loads in my browser with the access denied style you ensured means that means the connection is working

Screenshot 2026-05-16 102818
Screenshot 2026-05-16 1028182792×1618 104 KB

5

Hello,

Are you using any firewall or VPN? Please also try a different Internet connection.

Let me know if you continue to experience this error!

6

yes I am unfortunately still experiencing this error despite not using any firewall or vpn and I have already tried multiple internet connections and multiple devices even, and even followed the AI suggestion to change the DNS to 1111. however it is still not working.

8

I’ve tagged a developer, and he will take a look as soon as possible and get back to you!

1 Like
9

Can you use Help > About > Copy Debug Info and post the text?

Do you have any issues viewing notes with images in the website? https://app.ankihub.net/