Overlay Section no longer active

I created login and register as an overlay section. See screenshot link - https://prnt.sc/Uamm0FCp0T82

See demo site link - https://www.televisionjamaica.com

Users were registering and logging in quite fine, but suddenly it has stopped working and now the overlay for "Login" or "Register" will not load.

What may have gone wrong? Thanks for your guidance.

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