Hi EmanueleBertoni,
We appreciate that you posted back and confirmed the scenario with us. We also appreciate that you spent your precious time doing those tests.
We checked your description, and it seems that new files have the same problem and you can open the same link in the other non-office applications.
At the same time, currently, only links from Twitter have this problem.
If my understanding is right, we have also tested with the latest version of Current Channel, and we inserted Twitter link into footnote and we can open it without any problem.
As shown below:


Given this situation, we’d suggest you check if this issue only occurs on specific Twitter link, if all Twitter links have the same problem, we’d suggest you try the suggestions below and hope that will help you:
- We’d suggest you enter Windows+R and type regedit, then click OK.
- Please locate the following registry key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\9.0\Common\Internet (If you cannot find 9.0, you can right-click Office and New key with name 9.0)
- Then you can right-click Internet and new DWORD: ForceShellExecute with Value 1
WARNING: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be resolved. Use Registry Edit at your own risk.
For more details, you can also refer to this article: Error message when selecting hyperlink in Office: "Cannot locate the Internet server or proxy server"
If the suggestion above doesn’t work, you can also do an Office Online repair. Repair an Office application. This will reset all Office applications.
In the meantime, to narrow down this issue, could you also provide the information below?
- May I know if all Twitter links have the same problem? If only specific link has such problem, you can also share it with us and we can test it on our side.
- Could you provide the screenshot of error message?
- May I know if the other Office applications have the same problem? You can insert the same link into Excel file to check if the same problem will occur.
Thank you for your patience so far.
Best Regards,
Sukie