Same here. When I logged in it actually did an update, but that didn't help.
It crashed 3-4 times before I could establish a connection, but once I finally did, I could never switch to another app. Everytime I did, Logmein crashed and I had to start over.
It is a shame Apple didn't provide a beta of Mojave to developers to test with so they could have their apps ready to go at launch date.
Client issues are rendering my use of LogMeIn impossible. I have no clue what the problem is. Everything works until I click away from the client app or switch desktop spaces. Here is my Problem Report screenshot.
I am experiencing the exact same issue. I found a good workaround that really works !!!!
Just uncheck the "Grey Scale when inactive" box option in "Options -> Color Quality -Advanced".
It will then never crash anymore