Thank you for your reply, Sayontan. I see. It must be another problem then. However, it only seems to occur on the Chrome browser and my colleague who reported this said he hadn't used this website for a few months, which seemed to correspond to some possible changes in Chrome.
I have the Gutenberg extension installed but not activated.
When I load the Add Photonic Gallery window in the editor, I get the error below.
Thanks anyway for your quick reply.
Best wishes,
Alan
load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils,wp-polyfill&ver=6.9.4:5 JQMIGRATE: Migrate is installed, version 3.4.1
load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils,wp-polyfill&ver=6.9.4:2 Uncaught SecurityError: Failed to read a named property 'document' from 'Window': Blocked a frame with origin "https://france.upf.org" from accessing a cross-origin frame.
at HTMLDocument.<anonymous> (wizard.js?ver=20260328-72702:13:2)
at e (load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils,wp-polyfill&ver=6.9.4:2:27028)
at t (load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils,wp-polyfill&ver=6.9.4:2:27330)
(anonymous) @ wizard.js?ver=20260328-72702:13
e @ load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils,wp-polyfill&ver=6.9.4:2
t @ load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils,wp-polyfill&ver=6.9.4:2
setTimeout
(anonymous) @ load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils,wp-polyfill&ver=6.9.4:2
c @ load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils,wp-polyfill&ver=6.9.4:2
fireWith @ load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils,wp-polyfill&ver=6.9.4:2
fire @ load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils,wp-polyfill&ver=6.9.4:2
c @ load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils,wp-polyfill&ver=6.9.4:2
fireWith @ load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils,wp-polyfill&ver=6.9.4:2
ready @ load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils,wp-polyfill&ver=6.9.4:2
P @ load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils,wp-polyfill&ver=6.9.4:2
/wp-admin/admin.php?action=photonic_wizard&class=photonic-flow&post_id=20409&nonce=15b0716ef3&width=1000&height=600:268 GET https://france.upf.org/wp-admin/remote 404 (Not Found)
jquery-migrate.min.js?ver=3.4.1:2 JQMIGRATE: Migrate is installed, version 3.4.1
complianz.min.js?ver=1770145816:1 opt-in