Model file suddenly not opening on ipad


I’m hoping someone can help. I am stuck and totally confused about what’s going wrong with a model I have been working on for a week and now can’t open…

The file is 88.6MB and is a garden model, it was working fine then suddenly it slowed down, froze and now it won’t open at all. It says loading then nothing happens. I’m working on an iPad version. I’ve raised a ticket and they have asked that I send a copy but when I try to export to send them a copy I click export, select 3D model format and it thinks then nothing happens.

Can anyone talk me through where I’m going wrong please? Thank you!

Instead of export maybe use download skp and send that to them.