Acrobat had an error converting to PDF [JavaScript Application] Adobe Acrobat DC - Create PDF Firefox extension Add-on

[josemm]

Using Adobe Acrobat DC - Create PDF Firefox extension Add-on (as well happens using Chrome extension) gives this error

I tried using different web pages.

Also happens when I tried to combine several files and one of them is a web page file (url or local file).

it stopped working. I was using this extension for more than a week.

Other times gives this error.

Best regards.

[Meirion Roberts]

I got this error message. Then I discovered by accident that if Acrobat DC was already open, the Convert to PDF button worked. So it seems that the browser add-on is unable to open Acrobat DC but works if it's already open.