How To Fix SABP_UNIT100 - The class pool <&1> contains no executable unit tests; see long text

SABP_UNIT100 - Overview

• Message type: E = Error

• Message class: SABP_UNIT - ABAP Unit Messages

• Message number: 100

• Message text: The class pool <&1> contains no executable unit tests; see long text

What causes this issue?

The active version of the class pool does not contain any <DS>
<DS:TX.SAUNIT_EXECUTABLE_UNIT_TEST>executable</></> unit test.

How to fix this error?

Check if the test class satisfies the criteria to be an executable unit
test. In case the test class satisfies all criteria but you get this
message activate the program again.
&FURTHER_HINTS&
See <DS><DS:ABEN.ABAP_UNIT_GLOSRY>ABAP Unit</></> documentation.

Error message extract from SAP system. Copyright SAP SE.

SABP_UNIT100 - Details

• The SAP error message SABP_UNIT100 indicates that the specified class pool does not contain any executable unit tests. This message typically arises when you are trying to execute or run unit tests for a class pool, but there are no defined unit tests available.
  
  Cause:
  
  No Unit Tests Defined: The primary cause of this error is that the class pool specified does not have any unit tests implemented. Unit tests are typically written in ABAP using the ABAP Unit framework.
  Incorrect Class Pool: You may be trying to run tests on a class pool that is not intended for unit testing or does not contain the relevant test classes.
  Test Classes Not Active: The test classes may exist but are not active or properly configured.
  
  
  Solution:
  
  
  Create Unit Tests: If you are the developer, you need to create unit tests for the classes in the specified class pool. You can do this by:
  
  Navigating to the ABAP