One particular folder crashing DTTG

I have one folder, that until recently was fine, that now crashed when I try to open any document contains within it. I can’t open any of the document from the Files app - it just displays the ‘holding’ page as if it needs downloading.

This is the same on both ipads.

I’ve tried duplicating the folder in DTTG but get the same results.

Other folders are fine.

I will have access to my Mac tomorrow - what do I need to do to rectify this, please? I have exams on Wednesday and this is my folder of material so I’m keen to get it sorted.

Hold the Option key and choose Help > Report bug to start a support ticket.

Thanks, have done so.

Turns out it’s not a dttg issue, BTW.