Bitcoin Mining Pool setup - Pool does not own wallet address
To all the future folks coming to this page from Google. The solution is simple.
The solution is for UNOMP, but it should be same for other pools as well.
Open:
paymentProcessors.js 

go to line 84 and change
isMine to isValid

restart the pool and payment processor will load without error. I just realized that validateAddress response has changed but pool libs are not updated.