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Unable to Accept and Continue on a trusted site with this code: MOZILLA_PKIX_ERROR_SELF_SIGNED_CERT

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My Firefox was updated last night to v111.0 and, when I logged on this morning, a site that I have used daily for several months did not connect bacause of a potential security issue. The site is one of the Cher French Archives (www.archives18.fr) and the error code is MOZILLA_PKIX_ERROR_SELF_SIGNED_CERT. Per your instructions, I should be able to "Accept the Risk and Continue" on the ADVANCED page. However, that option is not available when I jump to the ADVANCED page. Please help! This is a valid site.

My Firefox was updated last night to v111.0 and, when I logged on this morning, a site that I have used daily for several months did not connect bacause of a potential security issue. The site is one of the Cher French Archives (www.archives18.fr) and the error code is MOZILLA_PKIX_ERROR_SELF_SIGNED_CERT. Per your instructions, I should be able to "Accept the Risk and Continue" on the ADVANCED page. However, that option is not available when I jump to the ADVANCED page. Please help! This is a valid site.

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I just attempted to access the site and I was able to reach it (no error code). Not sure what's going on.