There was an error while reading a stream.

I had the same problem with Arcobat DC on a mac. I was able to find a work around by selecting "Save as" instead of "Save". Save as the same file to the same location -> replace when prompted. Before I did this I would swap a few pages and hit Save and would loose parts of pages. Hope that helps. 2019 Mac book pro touch bar

Hello Dnguyen,

We're sorry for the trouble you had with Adobe Reader, please reboot the machine once and navigate to Adobe Reader's Preferences and disable the 'Enable Protected Mode at startup'>click OK and relaunch Adobe Reader and check.

Are you getting this error message with all the PDF files or is it with a specific PDF file? Is it a scanned PDF file or PDF file with text?

Remove Adobe Reader using Acrobat cleaner tool Download Adobe Reader and Acrobat Cleaner Tool - Adobe Labs

Reboot the machine and install Adobe Reader from Adobe - Adobe Acrobat Reader DC Distribution

If the issue is with a specific PDF file, is it possible to share the file with us so that we can test it at our end? To share the file, use a direct/private message method only How Do I Send Private Message

Let us know how it goes and share your observation.

Thanks,

Anand Sri.