In logfile this record:
{“reqId”:“2jpZL8yMBpOSsOoaEItx”,“level”:1,“time”:“2019-02-25T12:54:06+00:00”,“remoteAddr”:“10.0.5.249”,“user”:“3D6DF050-2506-48E0-A7F6-0609458F80A6”,“app”:“appstoreFetcher”,“method”:“GET”,“url”:“/settings/apps/categories”,“message”:{“Exception”:“OCP\Files\NotPermittedException”,“Message”:“”,“Code”:0,“Trace”:[{“file”:“/var/www/nextcloud/lib/private/Files/SimpleFS/SimpleFile.php”,“line”:104,“function”:“putContent”,“class”:“OC\Files\Node\File”,“type”:“->”,“args”:["{"data":[{"id":"customization","translations":{"en":{"name":"Customization","description":"Themes, layout and UX change apps"},"ca":{"name":"Personalitzaci\u00f3","description":"Temes, disposici\u00f3 i apps de canvi d\u2019UX"},"cs":{"name":"P\u0159izp\u016fsoben\u00ed","description":"Motivy a aplikace m\u011bn\u00edc\u00ed rozvr\u017een\u00ed a u\u017eivatelsk\u00e9 rozhran\u00ed"},"cy":{"name":"Customization","description":"Themes, layout and UX change apps … etc.
The categories are only displayed if your instance can establish a connection to the app store.
Due to the fact that a spinning wheel is shown in your screenshot you most likely cannot access the app store.
It seems that you’re running your test using a root account on your server. To get a reliable result
you should always test it with the same system account under which your web server is running
(Is it www-data on Ubuntu?).
The displayed log messages seem to point to a permission problem on your server "OCP\Files\NotPermittedException”. Aunt G. knows several issues related to this kind of messages. I think
it would be worse to have a look on it. Search for nextcloud exception “OCP\Files\NotPermittedException"
I found resolution for this problem.
Needs remove /var/www/nextcloud/data/appdata_XXXXXXXXXX/appstore directory, then NC create it and Apps is working.)