"Certificate not valid", https issue

I get an error message when connecting to my forum (www.a-4-d.com). It seems like the https certificate is not valid anymore:

"The certificate for this site is not valid.

Because this connection is not secure, information (such as passwords or credit cards) will not be securely sent to this site and may be intercepted or seen by others.

We suggest you don't enter personal information into this site or avoid using this site.​"

More information:

"Your connection isn't private
Attackers might be trying to steal your information from www.a-4-d.com (for example, passwords, messages, or credit cards).
NET::ERR_CERT_COMMON_NAME_INVALID
Subject: m91.maxns.net

Issuer: R3

Expires on: Aug 19, 2023

Current date: Jun 22, 2023

PEM encoded chain:
-----BEGIN CERTIFICATE-----
MIIJETCCB/mgAwIBAgISA1bxgYgL3P83KQ0AZlhCFuPxMA0GCSqGSIb3DQEBCwUA
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-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
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-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
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-----END CERTIFICATE-----

Certificate Transparency:

SCT Cloudflare 'Nimbus2023' Log (Embedded in certificate, Verified)

SCT Google 'Argon2023' log (Embedded in certificate, Verified)"

Good afternoon!

Where did you purchase the domain name?
If not from our service, did you contact the service that gave you the domain name?

Maybe you just need to renew your SSL certificate

I bought the domain through Forumotion (I spent credits and purchased it). I don't know how to renew my SSL certificate.

I understand you.
Wait for a reply from @Luzz or @The Godfather

hello

i can redirect to your site without any issues
can you please recheck

Hello  @Soulmonster, 

Thank you for reporting, we had indeed a technical problem that affected several forums. 


Now it's solved.

Thank you so much guys. This thread can be locked now.

you are welcome

Problem solved & topic archived. Please read our forum rules: ESF General Rules