hpdorn wrote:During the test on the hosting server I saw a 403 error in the chrome console:
The issue is almost certainly caused by a Firewall rule (security) on your server. That is why you see a "403 forbidden" response, because that's normally what a firewall would respond. There is something in the image meta IPTC that your server firewall is reacting upon. You should ask your hosting about this ... You could normally ask them to disable a specific rule, or simply disable the firewall under the /panel/* folder, because all actions there are protected by LOGIN anyway.
hpdorn wrote:- local XAMPP Test environment with PHP 7.4 -> OK
Yes, it will work on your localhost, like it also did for me, because it doesn't have the hosting-specific Firewall rule.
hpdorn wrote:- changed PHP version to 8.1 on my hosting server -> Not OK
Yes, because the firewall on your server is enabled regardless of PHP version.
hpdorn wrote:- removed all IPTC Meta-Data -> OK
Yes, because the firewall is triggering on something inside your image meta.