Transaction code & is not defined ( notify system support )

What causes this issue?

The transaction code &V1& is not listed in table T020. However, the
information from this table is needed so that the subsequent screens
within a transaction can be found in table T019.

System Response

Abnormal termination of current activity (for example, batch input
session creation, update).

How to fix this error?

Please contact person in charge.
Maintain table T020 or check to see if the transaction code transferred
to the function module "NEXT_DYNPRO_SEARCH" is correct.

Error message extract from SAP system. Copyright SAP SE.