If you are getting the error message "Adobe Acrobat does not allow connection to:..." Then please follow the below steps:
Open Adobe Reader.
Click on Edit at the top of the screen and then click on Preferences from the drop-down.
Click on Trust Manager on the left-hand side.
Click on Change Settings under Internet Access from PDF Files outside the web browser.
Click on the path and then click delete.
The path will now have been deleted and you should now be able to open the PDFs as usual.
If you are still having issues, please raise a new case online and reference the title of this article.