SYST: Error when sending online window (Contact Specialist)

What happened?

The processing method you have chosen, has a POPUP window which tells
you that data might be lost, and asks you if you want to save. For
technical reasons the POPUP window may not disappear from your screen.

System activities

Further processing on the same screen is possible

What to do next

The POPUP window title is too large. Correct the program.

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.