Facing Login Issue

Hello, good day, we’re using this plugin to our multiple websites it’s been 2 years.

But recently found one issue that when we try to login to the admin portal (wp-admin), it doens’t allow us to login insead asking to contact the site admin, while we’re the admin, please check: https://prnt.sc/twxf01Jf7Usb

I found the site that has this plugin are causing the issue, this fixed when we remove the cache, but after a few days later it happens again, we’re facing this problem last 2 month.

[note: we didn’t add any custom admin login url]

Please could you fix that? thanks