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,

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.

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