After this or previous beta, my ProtonVPN desktop software cannot connect to any VPN server. When I switched off Avast Firewall and reverted back to Windows 10 Firewall, it can connect in seconds. I had no such problem in previous betas except I had to set ProtonVPN Network to Trusted Network.
No issue here running Proton VPN 3.29 Free with Avast Premium current beta and Win 11. Perhaps you could delete the current Proton rules and allow Avast to reset them?