The UC-X30 was new in 2008 so is quite a venerable camcorder by today's standards. I would guess that wear and tear has taken its toll. There may be a small hole under the tape door and, with a fine pointer, you may be able to release the door.
Fixing your cam could be expensive and, due to its age, may prove impossible. I retired my Canon HV20 as I became concerned with the wear on the mechanical tape drive.
I suggest you move on to newer models with SD card recording and no mechanical moving parts. Sorry.
So i have this camcorder and the cassette door doesn't open and it flashes EJECT on the viewfinder. It doesn't play the tape or record or anything. So what causes this and is there any way i could fix this?