I just installed zenphoto using the Softaculous installer in cpanel and get an error Cross Site Request Forgery blocked whenever I try to change anything - for example changing the theme or adding an album.

I tried deleting and reinstalling zenphoto and get the same thing and also tried downloading the software from zenphoto and installing that and get the same thing.

I tried accessing it through chrome, internet explorer and firefox and still get the same.

This is the log:

2016-10-06 05:31:29 171.6.244.225 Authorization cookie check Failed 7:5yYBOVJcSKZPaqMKQIWWdwH0bCo0R/J9ir8GQCykrOk=
2016-10-06 05:31:45 171.6.244.225 Admin login database Administrator Success zp_admin
2016-10-06 05:32:13 171.6.244.225 Cross Site Reference database Administrator Blocked admin-themes
2016-10-06 05:32:32 171.6.244.225 Cross Site Reference database Administrator Blocked newalbum

Hope someone can help :-)

Please check if you're not logged-in more than once. Perhaps in different browsers.

Just tried that but same error. I loogged out of all 3 browsers then tried each one individually logging on, trying to adjust then logging off.

Did refreshing the page help? Sometimes browser caches play tricks.

tried but same error

Logging in with several browser should not really cause this. Did you try to clear cookies manually? Sometimes they can be a bit too persistent.

Well, I didn't find out what was causing it but I set up new hosting and new domain and it works fine so must have been something on the other hosting.

Thanks for your help

Glad you got it working at least! Too bad we don't know what exactyl the issue was but servers are sadly different…