Studio 2019, problems with PPTX files

I bought Studio 2019 last Friday and I have had no problems with Word files. However, I'm working with a package of several PPTX files and I'm getting error messages when I tried to open the target files.
In Studio nothings seems wrong, after translating the first file I saved the bilingual and target file without problems. But when I tried to open the target file to read it, I got the error message
"PowerPoint found a problem with content in (file name). Power Point can attempt to repair the presentation Krogerfeedback".
I then clicked on Repair and then got the message
"PowerPoint couldn't read some content in (file name). Repaired and removed it". The result is a blank, unusable file.
I know a similar problem was encountered here: Article Number:000009808 |Last Updated:09/05/2019 15:01. I have tried to follow those instructions but the PowerPoint versions that have to be disabled and enabled are different in Studio 2019.
Any help would be appreciated. 
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