If you do an image search for #image NEAR <Gen 2:18>, Logos crashes with
Error ID: 8569Error detail: MethodBehaviorConverterException: Exception executing LDLS4.TextAutoCompleter.CompleteTextOrExecuteCommand
0842.LogosCrash.txt
I've filed a case for this crash.
This appears to be fixed in 5.1 Beta 5. Please let us know if you are still experiencing this crash after that beta ships.