Just recently I started getting this error message on almost all of the target URLs that I try to post to.
I use Scrapebox to scrape Google so I know for a fact most of them are up online. I checked a good handful and all of them open fine in the browser.
I updated GSA to v11.01 but I am still having the same problem.
I'm running 65 shared proxies at 350 threads. I checked all of them and they test fine.