Setting up Nextcloud together with Volumio on Raspberry : Redirection conflict

Dear all,

I’m trying to setup a nextcloud server on a Raspberry running on Volumio (an audiophile distribution which is based on a Raspbian distribution). To be noted, I have some basic knowledge of command lines, but none regarding web servers.

After nextcloud installation through command lines, I try to access the nextcloud configuration wizard through http://myip/nextcloud, but I keep getting redirected to http://myip/playback, which is the default page when using Volumio.

I guess there is some server configuration involved here, but I have no clue where I should put my finger on.
Your feedback would be much appreciated,