Help. glitch occured, can't drag/drop form Stylus RMX

I was dragging a midi file from Stylus RMX to a track and the cursor changes to a cursor with drop midi file but dooesn’t let e drop a midi file, and the cursor stays like that for about a half a minute and than changes to a regular cursor.
I tried restarting cubase and the computer, but this glitch doesn’t go away, i even tried creating another instance of stylus rmx still same thing happens.