That's because you were flagged as spammer.
Please manually disable Admin Tools system plugin, then get inside the Control Panel ,there should be a button named Unlock my IP.
If after clicking it you are still blocked after few pages, please get inside the Security Exception page and post here the reason of the block, so I can help you.
Davide Tampellini
Developer and Support Staff
🇮🇹Italian: native 🇬🇧English: good • 🕐 My time zone is Europe / Rome (UTC +1)
Please keep in mind my timezone and cultural differences when reading my replies. Thank you!