USQL Unit testing with ADL tools for VS 2017 - Error after upgrading to 2.3.4000.x

One of the team member after upgrading the ADL tools for VS to version 2.3.4000.x, getting the below error.. • “* Error : (-1,-1) 'E_CSC_SYSTEM_INTERNAL: Internal error! The ObjectManager found an invalid number of fixups. This usually indicates a problem in the Formatter.' • * Compile failed !”

Tried to downgrade back to version ( 2.3.3000.2 ), it didn't help much.

If encountered similar issue, found the reason and resolved it, please share it.