Error: 'The ConnectionString property has not been initalised'

Try to import the data but receive the following error message:-

Orchestrate Data Flow Import has failed. The detailed information is as follows:

The ConnectionString property has not been initalised

Import Command:

EXEC [wf].[pr_Merge_orc_orders]

The functionality has been enhanced in Orchestrate version 7.80. Please upgrade to this version or above.