Hi Taraw,
We apologize for the delay in response to your query.
If you are still experiencing the same issue and looking for the resolution to this problem. Then please share more information to look into it further.
1- Which Adobe service you are using to share the pdf as link? I assume its Adobe Send & Track?
2- Are you using the web service or Adobe Reader DC desktop app?
3- The Send & Track feature has now been changed with the latest update of Document Cloud web interface. Try the new experience Adobe Document Cloud
Also, Share files online with Adobe Acrobat
4- When trying to access the service, disable the firewall and antivirus (if installed)
[Antivirus software can help protect your computer against viruses and other security threats. In most cases, you shouldn't disable your antivirus software. If you have to temporarily disable it to install or activate other software, you should re-enable it as soon as you're done.]
Regards,
Akanchha