Why Did I Get IP Banned and How Can I Fix It? or IP Banned for No Reason? What’s Going On? or

Dude, same. Got ip banned and was clueless.

Turns out my adblocker was flagging their system. Whitelisted the site and boom—fixed.

Also, check if your IP is blacklisted (mxtoolbox.com can help). Might not be the site’s fault at all.