Internal Server Error when a user logs in for the first time

Hi !

when a new created user tries to login for the first time then the result is an internal error.

When he logs in for the second time, then it works correctly without any internal error.

When the error occurs I get these lines in apache error.log, but I’m not sure what it means.

[Fri Feb 15 15:06:03.530529 2019] [proxy_fcgi:error] [pid 51482:tid 140513269802752] [client 37.24.113.245:54272] AH01071: Got error ‘PHP message: {“reqId”:“i7CsqQWTTx3L7EzGWA8D”,“level”:3,“time”:“2019-02-15T15:06:03+01:00”,“remoteAddr”:“37.24.113.245”,“user”:“next1”,“app”:“index”,“method”:“POST”,“url”:"\/index.php\/login",“message”:{“Exception”:“OCP\\Files\\NotFoundException”,“Message”:"",“Code”:0,“Trace”:[{“file”:"\/var\/www\/html\/nextcloud\/lib\/private\/Files\/Node\/Node.php",“line”:216,“function”:“getFileInfo”,“class”:“OC\\Files\\Node\\Node”,“type”:"->",“args”:[]},{“file”:"\/var\/www\/html\/nextcloud\/lib\/private\/Files\/Node\/Node.php",“line”:117,“function”:“getPermissions”,“class”:“OC\\Files\\Node\\Node”,“type”:"->",“args”:[]},{“file”:"\/var\/www\/html\/nextcloud\/lib\/private\/Files\/Node\/Folder.php",“line”:176,“function”:“checkPermissions”,“class”:“OC\\Files\\Node\\Node”,“type”:"->",“args”:[4]},{“file”:"\/var\/www\/html\/nextcloud\/lib\/private\/legacy\/util.php",“line”:465,“function”:“newFile”,“class”:“OC\\Files\\Node\\Folder”,“type”:"->",“args”:[“Coast.jpg”]},{“file”:"\/var\/www\/html\/nextcloud\/lib\/private\/legacy\/util…\n’

I use the newest version of nextcloud.

Thanks in advance,

Raphael