AnkiHub error on launch of desktop PC client

**Before the error happened, I was…opening anki on my desktop computer and received a message saying that I needed to do a full sync
[Replace this text.]

Error message (don't change this)
Anki 2.1.63 (f356f177) Python 3.9.15 Qt 6.4.3 PyQt 6.4.0
Platform: Windows-10-10.0.19045
Flags: frz=True ao=True sv=2
Add-ons, last update check: 2024-02-05 09:30:39

Traceback (most recent call last):

  File "aqt.taskman", line 122, in _on_closures_pending

  File "aqt.taskman", line 71, in <lambda>

  File "aqt.taskman", line 90, in wrapped_done

  File "C:\Users\moneymakerRB\AppData\Roaming\Anki2\addons21\1322529746\gui\operations\", line 43, in on_sync_done

  File "C:\Users\moneymakerRB\AppData\Roaming\Anki2\addons21\1322529746\gui\", line 101, in sync_with_ankiweb

  File "concurrent.futures._base", line 439, in result

  File "concurrent.futures._base", line 391, in __get_result

  File "concurrent.futures.thread", line 58, in run

  File "C:\Users\moneymakerRB\AppData\Roaming\Anki2\addons21\1322529746\gui\operations\", line 36, in <lambda>
    task=lambda: ah_deck_updater.update_decks_and_media(to_sync_ah_dids),

  File "C:\Users\moneymakerRB\AppData\Roaming\Anki2\addons21\1322529746\gui\", line 53, in update_decks_and_media

  File "C:\Users\moneymakerRB\AppData\Roaming\Anki2\addons21\1322529746\gui\", line 76, in _update_decks
    should_continue = self._update_single_deck(ah_did)

  File "C:\Users\moneymakerRB\AppData\Roaming\Anki2\addons21\1322529746\gui\", line 90, in _update_single_deck
    result = self._download_updates_for_deck(ankihub_did)

  File "C:\Users\moneymakerRB\AppData\Roaming\Anki2\addons21\1322529746\gui\", line 108, in _download_updates_for_deck
    for chunk in self._client.get_deck_updates(

  File "C:\Users\moneymakerRB\AppData\Roaming\Anki2\addons21\1322529746\ankihub_client\", line 707, in get_deck_updates
    notes_data = json.loads(self._gzip_decompress_string(notes_data_gzipped))

  File "json", line 346, in loads

  File "json.decoder", line 337, in decode

  File "json.decoder", line 355, in raw_decode

json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

Sentry link (for developers)

1 Like


The developer team has been notified of this issue.

Please hang tight while we investigate this issue, we will inform you of the outcome

Thank you for your patience


The issue has been fixed! Try syncing now and it should work. If it does not, please let us know!