scrapebox proxy test error

Hi there, I really struggle with something here and was hoping someone could give an answer.

So i have a list of proxies, about 100 of them, and i want to text which one is available using the integrated test function of the scrapebox.

But when i insert the ip addresses and run the check, it seems like nothing is happening. and the status of test is stuck on "processing" ..

Does anyone know why and how to fix this?