X3Photo Gallery Forums

Fialex wrote: Old: xyz.de
New. fotos.xyz.de

This isn't the actual URL though?

Fialex wrote:Unable to write in the cache directory (./_cache/pages).

Sounds like you have copied the files with incorrect permissions. Either that, or you have a mismatch of "owners" between PHP (running the script) and/or FTP (that copied the files) and/or the owner of the dir itself. You need to check, first of all is the folder there, then check it's owner and permissions. If you have permissions issues, this could also affect all the other folders that you copied in (for example, the X3 panel might not be able to create folders or upload images).

Also, check your ?diagnostics page. It might report something, and it might even correct some issues.
yourwebsite.com/?diagnostics

Really this is something you should resolve with your hosting service as it's related to permissions. If I am to diagnose further, I need real links and possible FTP login.