At least one error occurred during customer actions exit

What causes this issue?

During the customer-specific routines of the removal or installation
check, at least one serious error was reported.

System Response

The process is terminated. The system cannot save your entries.

How to fix this error?

Open the application log and check all the error messages. You can
either try to correct the error situations, if possible, or activate the
"Forced Installation/Removal Mode" to overrule the check results. In any
case, save your entries again to restart the removal/installation
process.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.