Pipeline using copy assistant shows RequestValidationFailed

While creating a new Pipeline to load Azure SQL DB to Fabric Lakehouse, getting the following error when trying to save + run the pipeline.

Publishing Error:

{"code":"RequestValidationFailed","pbi.error":{"code":"RequestValidationFailed"}}

Recreate Steps:

1. Create Pipeline.

2. Copy Assistant to read data from Azure SQL.

3. Load 3 tables to Lakehouse using append mode with partition.