i have tried to install Nextcloud with the mentioned method on page 1but ass i was progressing through the installation i collided with some problems.
I'm running OMV 3.0.35, MySQL 3.0.3 and Nginx 3.0.5!
1. when i create the Folders for MySQL and Nginx i see they are not referenced (Screen 2)
2. When i try to point MySQL for the DB Folder i created there is not a Database Folder option in MySQL (Screen 3)
3. After the inserting the file setup-nextcloud.php in www/nextcloud i get the Error Message in Screen 1 when i tried to run it.
Can somebody point me in the right direction?
i got over the 502 bad gateway problem by disabling then enabling mysql plugin.
and maybe service php5-fpm restart and service nginx restart
hope that helps...
looks like you have to start over, and install mysql and nginx plugins anew...