Plarium Play was working one day, and not the next (10/21/2021). I can still use my mobile (iOS) platform, just not the PC, which is a bummer. 10 days and counting...
Three support requests, and finally an answer today. Sadly, Support did not actually read my message or look at the Cloudflare screenshot (Error 1010 access denied, banned based on browser signature) or my log (pp_log.txt). They just sent me their 'Common loading issues' support email.
I tried rebooting PC, rebooting WiFi, logging in with/without a VPN, uninstalling and reinstalling Plarium Play, clearing the cache, updating Visual C++ libraries, updating DirectX. All proved futile.