X Raw studio initially recognizes my x-e4. Then it doesn't.

[BobNSA]

X Raw studio initially recognises my x-e4.  Then it doesn't.  It then starts searching for it.  Sometimes it finds it and I can use the app for a few minutes.  THen the search process starts all over again.  Most of the time not finding the camera.  I then need to remove the battery in order to stop the green light flashing.   I tried different cables and ports but the result is always the same.  I have installed the most recent update as well 1.220