My decks dissapear after imporitng an anki deck

[kelciour]

It might be the same issue.

Deck list is blank

The method Anki uses to send the deck list to the web toolkit can’t cope with very large deck lists. This may be fixed in the future when a different approach is taken, but for now I’m afraid the only option is to reduce the number of decks and/or the length of the names until it starts working again. You could either split unused decks off into a separate profile with export+delete+import, or merge the child decks using https://ankiweb.net/shared/info/113367344