Here's what's happening:
Looked for the bug in Firecrap and IE, can't reproduce there. Seems to be a Chrome-only bug.
@lukelarris Refresh your browser cache. Should do it.
@a_5mith Yep, that worked. Thanks.
@ahoh said in TypeError: Cannot read properties of undefined (reading 'length'):
remove plugin nodebb-plugin-sso-beer-qq
Make sure persona theme and core is latest too.
@Gurax the categories API does not return unread-class for sub categories.
Possibly fixed with https://github.com/NodeBB/NodeBB/commit/e420ee5fb65cd10e0d4e86a1da763f861957dc8f, I updated this forum let me know if you can reproduce again.
@Guiri I see, I have solved.
But I have some problems, I don't know which database I should use.
mongo or redis ?