We are working on this issue via technical support case, we will update the resolution here as well.
For anyone else who is having the same issue here is the latest from Cypress.
We had confirmed with ARM that there is an issue existing, which blocks the import process from PSoC Creator to µVision V126.96.36.199.
They had confirmed that the issue will be addressed in the next version v5.21, which will be released by August as per the plan.
Until then you need to use lower version of uvision. The issue is there for version v5.16 to v5.20.
I can confirm that the v5.21 update for uVision has solved this issue.