Changed datapath, 403 access denied?

Server
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Hello,

  1. Running OC 9.1.4 from Ubuntu VHDX under Hyper-V. All runs perfectly no errors, using Let's Encrypt cert HTTPS
  2. Simply changed the datapath to a folder outside www in the OC config
  3. Assigned 755 to www-data to /var/ocdata

But already on the index page (login) I get 403 access denied? I checked the apache2 user which is indeed www-data. If have no SELinux config.

I'm a bit clueless what can cause this. Someone experienced the same?

Thanks for your feedback