Hi all,
We have disabled the updater & removed 3.4.0 from the download page - for now, we are hunting down this bug and will release a 3.4.1 as soon as possible that should fix it. Unfortunately it is in a very old code path that seemingly got triggered in some situations with the new bulk upload.
I do believe this only hits on systems with Nextcloud 23/Hub II, but I will try to get confirmation for that and if you have evidence to the contrary, let me know.
EDIT: no, it also hits on older versions. 3.4.1 will have to fix it.
I’m sorry for the bug - clearly not enough people tested the 3.4 RC’s - if you have any suggestions on how we could get more volunteers to test our release candidates, let me know!