I am getting errors in the Nextcloud instance I have been getting 412 responses at random times. I have no idea of the source of this. I have a VPS on Digital Ocean with minimal load on it.
Since almost the first day of my Nextcloud installation I have this issue. It seems that it was there all the time and it is more prominent now during this COVID-19 situation when using Talk during the day.
Logs and relevant information can be seen in this issue.
The reason I am posting this here is that it seems to come from Nginx. I get at "radnom" (I do not know if they are random) times a 412 error and there is a disconnection. Sometimes the disconnection means complete disconnection that I need to reenter my credentials. This happens to both Firefox and Chrome and in both Windows and Linux.
My Nginx configuration is exactly the same as proposed by the documentation here.
I have been searching intensively last week and I could not find anything. The strange thing is that I am not getting any error in all the following logs: nginx, nextcloud, coturn, php.
The only thing I am getting is a 412 response in the Nginx access.log.
