If your flash isn’t turning on then it’s likely that the battery powering the flash has died. We recommend changing the battery every 7-8 weeks, however, leaving the flash on can drain the battery life quicker - no need to panic though - just load a new AAA battery into your camera and you can go straight back to taking stunning pictures!
If your flash isn't going off when you take a photo, then it's likely the film wasn't loaded correctly and we recommend emailing us at hello@ubuntufilm.co so we can assist you further.