Connection Error on admin page: license check !!

[AMir ali]

Hello,

we are experiencing a license check issue 3 days ago, the support service was not able to help us with an answer delay of 24 hours !!!, so I share with you this issue if someone has experienced this problem before:

Connection Error

WHMCS has not been able to verify your license for the last few days.

Before you can access your WHMCS Admin Area again, the license needs to be validated successfully. Please check & ensure that you don't have a firewall or DNS rule blocking outgoing connections to our website.

For further assistance, please refer to the License Troubleshooting documentation.

Can any one help .

Thanks

[DennisHermannsen]

We're seeing the same issue on 1 out of 3 WHMCS installations. Pages start loading slow and eventually will give us the error.
After we force a license update, everything works fine for a little while.

Edit:
Just to clarify: All our WHMCS installations are running the same version of WHMCS on the same server. Only one installation is having issues.

Edited December 13, 2024 by DennisHermannsen

[mastly]

+ 1
We updated v8.11.2 24h ago and since random licence error issue

[AMir ali]

i have a stable version for 3 years ago without any issue, i think the problem comes from  whmcs license server, may be they made an update on it and it causes license check errors.

[DennisHermannsen]

I don't think the issue is related to version 8.11. We're on 8.10.1 and have the issue.

[DennisHermannsen]

I received the following reply from WHMCS:

Quote

Thank you for contacting WHMCS.

Recently we did enable Google Captcha within our system to help with any slow downs. However reviewing the recent access logs for your license key, I can see the following that would cause an error:

Invalid IP - Got <IPv6 address>, Expecting <IPv4 address>

To help with any further issues, I have manually added both IPs to your license. If the license key is reissued in the future only one IP will be saved by default.

Please let me know if I can assist you with any further questions or concerns.

Funny thing is that our IPv6 was already added to our valid IPs back in 2022 so I assume WHMCS has had some issues regarding licenses.

If you're using using both IPv4 and IPv6, I advise you to check the valid IPs for your license. Perhaps create a ticket with WHMCS just in case.

[AMir ali]

We still experience the same issue, my server IP is may be blacklisted 2 to 3 times a day, and it's very hard to change my server IP as this IP is API whitelisted  (allowed) in all our service provider, hope WHMCS fixe the issue,

[DennisHermannsen]

I'd advise you to create a ticket with WHMCS to have them look into the issue.