Hi Peik,
If the page does not work/respond, then it is very likely related to a javascript problem. Usually 3rd party scripts run into an error, then it stops the further page script execution.
I usually recommend turning off all other plugins and switching the theme back to default, to see if the issue persists. If so, then it might be a something else. In that case however, I will have to see it directly in order to be able to tell where the error is.
It is also possible, that one of the plugin files is missing or is not accessible. I suggest trying to delete and re-install the plugin via the plugin manager, to make sure that all files are present. Configuration and search instances will be kept in the database, you don’t have to worry about that.