CPanel migration Stuck on 10% Creating backups

I am migrating one account at a time from my CPanel over to CWP.
I did one small account first and it worked just fine.
I am now starting on some of the bigger ones.
Next one is approx 9GB. So still not too big.

I am not sure if i have inadvertently caused a problem by switch the nameservers over to CWP before the migration was completed.
Can anyone shed some light on that step in the process please.  I didn't see this mentioned in any of the documentation.
Should nameserver be changed prior to starting or after - or does it not make any difference since we are connecting via SSH directly via the IP address.

If the latter, it doesn't matter, then: I am not seeing any activity on CWP CPU.

Thanks.
Nagui

After turning off all ModSec Vendors on CPanel and started process again, it is now working.
Nagui