Thanks for your advice! Following your guidance I checked the entries in “Site Health”. Two recommendations indicated possible causes:
– REST API errors..
– File system not accessible..(or so)
After search in internet I found two things to try and change:
In apache2 configuration change to:
<Directory /var/www/>
Options Indexes FollowSymLinks
AllowOverride All
Require all granted
</Directory>
In wp-config.php insert at the end:
define(‘FS_METHOD’,’direct’);
and that resolved my error case!
Thanks again and for me this is resolved