Error: This operation is not allowed, since scanning is in progress.

[#1]

Using Adobe Acrobat Pro DC v. 2019.021.20061

As of today, when I try to enhance my scans, I get the error message:  This operation is not allowed, since scanning is in progress.

I have no scanner associated with this program.

Tried closing the app and got the same message.

Updated the app; repaired the installation.

Rebooted and still the same message when I try to enhance my scans.

Please help.  Thank you!

[#2]

Using Adobe Acrobat Pro DC v. 2019.021.20061

As of today, when I try to enhance my scans, I get the error message:  This operation is not allowed, since scanning is in progress.

I have no scanner associated with this program.

Tried closing the app and got the same message.

Updated the app; repaired the installation.

Rebooted and still the same message when I try to enhance my scans.

Please help.  Thank you!

[#3]

I have the same problem. I can no longer do optimize scanned pages on any PDF files

[#4]

I have been using my Epson Scanner With Adobe Acrobat for years.  Today, I had three of my machines stop working.  They go to page 1 of "optimizing" and stop.  The error message is 

This operation is not allowed, since scanning is in progress.  This can only mean that they made an error in a recent update.

[#5]

I'm having the same problem...hopefully an update is released ASAP. I tried enhancing my PDF in Acrobat pro both on a Mac and PC and neither works...get the same error message, "This operation is not allowed since scanning is in progress."

[#6]

I have had the same problem for several days now. It is VERY annoying. Hopefully, they are working on a solution. 

[#7]

Using the XPS Viewer , which is an Optional Feature you can download in Windows.  I was able to print the PDF document to Microsoft XPS Document Writer, open the file in XPS Viewer (*.oxps or *.xps).  Print the document to Adobe PDF.  I hope this helps.