Redundant vocational 521 error on wordpress website

On our website, 5XX error, most commonly 521 error occur redundantly. It resolves itself when we switch between strict and flexible mode in the SSL/TLS settings.

We need a permeant solution on this, so any help will be much appriciated.

Thank you.


What web server are you running on the WordPress side?
Are you using the origin certificate Cert or an external Cert (if so which one)?


That’s not a good idea in the first place.

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