At least one error occurred during customer actions exit

What causes this issue?

During the customer-specific check routines for removal or installation,
at least one message with a grave error was output.

System Response

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

How to fix this error?

View the application log and verify all 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.

Error message extract from SAP system. Copyright SAP SE.