"Preparing Index. Please wait!!" message

"Preparing Index. Please wait!!" message

I have Eventlog Analyzer 11066 build. Now for a long time there is a message:
"Preparing Index. Please wait!!"
Since the appearance of the message, I have no data from the monitored hosts
Any recommendations what I can do in this situation?
                New to ADManager Plus?

                  New to ADSelfService Plus?