Request couldn’t be handled error on deleting email on local server

Hi guys,
While deleting an email from the local server I received an error message. It says, "An unexpected error occurred and your request couldn't be handled. The entire error report is listed below:
HIDE REPORT. COPY ERROR DETAILS TO CLIPBOARD".
I have no idea for the error. I need to get a remedy of this issue. Please help.
Thanks in advance.
