XCPNG / Xen Orch Pool Join issue

Hey guys!
Getting around to adding a second server to my XCPNG pool
Two identical servers but im getting this error

POOL_JOINING_HOST_TLS_VERIFICATION_MISMATCH

I know what TLS is but I don’t really know what relevence this has to just adding a server to a pool

Any help would be appreciated, thanks!

Are the both runing version 8.3 and at the same patch levels?

Hey Tom!

They are now - at first I tried joining the new server to the existing pool and realised my existing pool was on 8.2.1
So i upgraded this to 8.3 and Xen is recognising both of them in 8.3

I also did a sudo yum update on both as they both had outstanding patches / updates after the netinstall of 8.3