Alright, so we already know that PX Harvester and cookies are needed for Solebox/SNIPES. Sites like SNIPES or Solebox (PX sites) are down at the moment.
Cookie generation tips
Make sure to generate PX cookies with unbanned proxies, high quality DCS/residentials will work well.
Make sure to use multiple browsers when generating cookies such as Google Chrome, Mozilla Firefox, Brave or Opera.
Have fresh PX cookies available every release you’re going for.
Important note - you're given 10k PX cookies quota (via PX API) weekly so make sure to put it to good use!