Please refer here:
Adobe Reader DC not opening hyperlinks
There is no doubt that something is happening with Acrobat Reader DC.
You are in trouble, not only you but others.
Fortunately Adobe seems to be proactively dealing.
They are now looking into this issue, and their Engineering Team is considering to fix it.
I will describe my experience.I made a document containing URLs in Word and created PDF through Microsoft Print to PDF.
On August 9th, I had a opportunity that I made a new installation of Reader DC and found that the version was newer than ever. Then I opened the PDF that I used so far and clicked URLs.
No reaction !!
I immediately thought this was an important specification change, or "bug". I looked up Known Issues and Forums. But nobody cares. I had to raise this unexpected behavior to Adobe as a bug report.
And now we have gained some knowledge of this strange phenomenon.
We only hope that the Engineering Team will deal with it as quickly as possible.