Internal Server Error - new user

Hi,

After creating a new user, I get an Internal server error.

The log says:

GNU nano 3.2 /var/www/nextcloud/data/nextcloud.lo

cu5gDbBph7q",“level”:3,“time”:“2019-09-01T15:50:40+00:00”,"remo$
{“reqId”:“pZxSTIcSFcu5gDbBph7q”,“level”:3,“time”:“2019-09-01T15:50:40+00:00”,"remo${“reqId”:“pZxSTIcSFcu5gDbBph7q”,“level”:3,“time”:“2019-09-01T15:50:40+00:00”,"remo$