The simplest solution is to unsubscribe from the Zankiphil - Klinik deck for now.
If you really need the deck now though (and feeling adventurous), this should allow you to import it:
- Go to Tools > Add-ons, select the AnkiHub add-on, and click View Files.
- Find the
ankihub_client/ankihub_client.py
file and open it in a text editor. - At the top you after the
import csv
line, paste the following two lines:
import sys
csv.field_size_limit(sys.maxsize)
4. Save the file, restart Anki, and try importing the deck again.