E9 to E10 SQL : Error Post Migration Scripts Data at the root level is invalid. Line 1, position 1

We are being migrate E9 to E10, when run “Migrate Epicor 9 Database” from EAC, other task are pass, except PostMigration, we can error as below. Any want got idea and suggestion for this error? Thanks in advance.

Error Post Migration Scripts Data at the root level is invalid. Line 1, position 1.