We support 20+ Android tablets where we run the Smart Office 2 app. Typically, we have Excel sheets loaded into Dropbox for our field techs to access, fill out a checklist in Smart Office and re-save them to Dropbox. As of yesterday, one of my users is getting an "Unsupported Document Type error any time he tries to open one of the checklists. I can access the files on my desktop through Dropbox with no issue, which illustrates that the files themselves are fine. I tried the same with Google Drive and got the same error, which narrowed down my focus to the Smart Office App.
The odd thing is that there are 2 Excel sheets in the Dropbox account which will open and be editable. But there are approx 30 sheets that will not open. The tablet in question is running Smart Office 2.3.3. Seems like the issue has started with the recent update. Any tips?