After having tried all the "solutions" to this problem as found on Internet, I finally found one that worked. Can“t remember the the site where I found it, but for me it works every time. I use Windows 10 professional.
Try this:
Kill any active browsers
Go to Services (C:\
Windows server 2019\System32\services.msc)
Find DHCP Client
Restart it.
Connect to your VPN
Check your new IP address via your browser
It works for me!!