Sorry, I have been away from the forums for a while. My apologies if this has already been asked.
I think this was supposed to be fixed in this release, but I have no time to test the beta this time round.
Not my words the original poster put:-
when in routing > create new static route with gateway type,
then selecting a new created network group does not work as network...
I can't save with the Network input blinking red..
https://community.sophos.com/products/unified-threat-management/astaroorg/f/93/t/66819