Proxy do not work

[lorenzoromani1983]

Hi. I have tried to send the requests with some proxies in a proxy.txt file.
But it doesn't work, as many selenium instances open in the browser and everything collapses.
Selenium opens up even if headless mode is True.
Then, I get this error:
scrapcore.scraper.selenium - WARNING - 'NoneType' object has no attribute 'group'
Furthermore, the proxy file appears not to be working if only one http proxy without user:pass is configured.