"An internal error occurred" when opening downloaded PDFs
Hi,
We are facing an issue with Adobe Acrobat version 25.001.20623 on Windows 11.
When trying to open any downloaded PDF, Acrobat shows the error:
"An internal error occurred"
Details
Version: Acrobat 25.001.20623
OS: Windows 11
Affects: all users tested, multiple machines
Local files (not downloaded) open normally.
Troubleshooting performed
Disabling “Protected Mode at startup” (Preferences → Security (Enhanced)) allows the file to open without error.
With Protected Mode enabled, the error occurs consistently.
Protected View settings (Off / Potentially unsafe locations / All files) do not resolve the issue.
Workaround
Currently the only working solution is to disable Protected Mode at startup, which is not ideal from a security perspective.
Can you help with that?
Thanks.
