Google was no help with this. I get this error on sync one folder. There is no clue why this happens right now. Nothing changed. I have only added more files to the folder. The same happens with other clients too. I have tried to raise settings in nginx.
Server Error (owncloud old install allways up to date 10.0.9.5):
19568#19568: *5571 client sent header field with too long length value while processing HTTP/2 connection
Owncloud Client (Linux error: Connection timed out
**Operating system: Gentoo Stable
**Web server: Nginx 1.15.2-r1
**OwnCloud version:10.0.9.5 old install allways updated update channel Production