Unable to Open Project

I've created a video on an iPad (5th Gen, Version 13.6) using Rush. I started the project 2 weeks ago, went to export on Monday, the app crashed and now it's saying 'Unable to Open Project'. The Premier Rush version is saying 1.5.25 (1102). I've done everything said in other posts (i.e. re-booted the app, uninstalled the app, re-started the iPad, sign out and in, shared to the cloud, tried on an iPhone and a PC. Nothing works!

Please help!