Private proxies test results "Error (IP Blocked, Captcha)" on Scrapebox Test Proxies

Hi,
I am getting "Error (IP Blocked, Captcha)" when test my private proxies list with ScrapeBox, could you please advise what would cause that problem. I just get the newly release proxies list which didn't use for any of my work but getting the same problem when test.

Another thing, can you share how many blog comment you can do using 25 private proxies in 8 hrs.? Is it normal that I can do only 20000 - 25000 (failed + posted) in 8 hrs.? Thank you.

That message means that the proxy is blocked on Google Search. Usually is a temporary ban

hi. how long does it usually take to remove the ban?

first will be fast (few hours), then will last longer and longer