Invalid bodies warnings preventing me from exporting all projects, even though I exported the same projects last month and last week

i can’t export my projects, even though I could export them last week and last month. I keep getting invalid bodies warnings on projects that didn’t have these problems last week. Only one project lets me export to STL, so I will not touch it. The sketches are merged so I can’t bring up the history. I can export with STEP & IGES formats, but there are missing parts, and the size of the model is super giant and not scaled for 3D printing. I have a lot of costumers waiting longer than expected because I haven’t fixed the issues on 5 out of 6 projects.
The projects all exported fine last week, and I only worked on 3 designs. Out of 6 projects,5 projects are now trapped in the app. I emailed support several times, but no response yet. I deleted the app, shut down the iPad, rebooted it, reinstalled the app, reloaded all projects, and only one projects will export with the STL format, while other 5 are still trapped and won’t export. I am blind, so I’m having a hard time figuring out this nightmare scenario. I am not able to sell my designs, on my Etsy store, due


to this ongoing problem. I need to be able to export with the STL format ASAP, before Christmas.

I was able to export these projects, but now they all have the same problems. Who here can actually fix the issues?