Hello Joseph from the UK,

We’ve made an extensive troubleshooting guide for film not developing issues on this camera.

If the film is developing blank, we recommend that you check to make sure the shutter is functioning properly and the light/five-mode dial is set to proper lighting. If the problem consists then replace the batteries. The other problem may be that the film you have has gone bad and at this point you'll need to buy a new batch.

Cheers!,

Richard