@StogponI believe if you are using DeltaTable.forPath then you have to pass the path where the table is. You can get this path from the Catalog. It is available in the details tab of the table.
Example:
delta_table_path = "dbfs:/user/hive/warehouse/xyz"
# Read the Delta table using forPath
deltaTable = DeltaTable.forPath(spark, delta_table_path)
The other way would be to use would be DeltaTable.forName(spark, 'tablename')
Hopefully this helps.