The VPN on my Android is blocking 4G and 5G mobile data

I use the VPN constantly on my Android phone but for the past week I haven’t been able to use 4G or 5G mobile data when I’m “out and about” even though it shows I have a signal. On Friday I disabled the VPN service and everything started working fine. It works without any problem when I’m at home on my routers Wifi. I’ve tried manually selecting a location which I thought had resolved the issue but it’s blocking the mobile data again.

Any ideas what to do. Ive seen the messages advising VPN is being upgraded. Is the issue anything to do with this?