Administrajtor [Overview Tab] issue


I was trying to see what error I may have in the Overview tab in the Administrator section. I click on Overview and got this error message. See attachment.

I am in the process of learning code, I am sure it just a coding issue but I could be wrong.

This is what I got from the log file:

{“reqId”:“tKr8piyh7XihkeWbMB15”,“level”:3,“time”:“2019-03-15T02:02:31+00:00”,“remoteAddr”:“”,“user”:“eredwood”,“app”:“PHP”,“method”:“GET”,“url”:"/nextcloud/index.php/apps/files/",“message”:“call_user_func() expects parameter 1 to be a valid callback, no array or string given at /var/www/html/nextcloud/3rdparty/symfony/event-dispatcher/EventDispatcher.php#212”,“userAgent”:“Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:65.0) Gecko/20100101 Firefox/65.0”,“version”:“”,“id”:“5c8b07d3257b5”}


That looks like an error in the php code. Unfortunately I have no clue how this is exactly caused.
But I found a similar (unanswered) post which refers to an external storage issue. I hope this will
help you finding the root cause of the problem:


Thank you j-ed i will check it out and let you know ether way my out come.