S2member canot login

EXPLANATION OF THE ISSUE

We have the latest s2member Pro version installed on our Wordpress site.

STEPS TO REPRODUCE THE ISSUE

Member tries to login via mobile or laptop and receives error 503.
The error states:
503: Service Temporarily Unavailable
Too many IP addresses accessing one secure area!
Please contact Support if you need assistance.

BEHAVIOR THAT I EXPECTED

Member should be able to login.

BEHAVIOR THAT I OBSERVED

How can this issue be fixed? Please help!

If you have s2member brute force protection enabled, relax the settings.

To let this member in you can reset the brute force protection retry count.