File = 1,69 MB
Have you tried changing the client_max_body_size in nginx?
Even though the default is 2MB, the actual data being transferred may be over that for the file you are uploading. Try 4MB.
@yariplus ha-ha, yes. It was in this. Now everything works fine, thank you!
This is not an issue with slick theme, it was related to a bug in core https://github.com/NodeBB/NodeBB/issues/6306
Yeah makes sense to me.
I managed to solve it, reinstalled from scratch.
Solved. I fixed it by changing the theme, rebuild and restart and then change the theme back to original, rebuild and restart.
Okay, thanks @julian
This isn't ideal considering future updates, but it is a viable solution.