Unable to get Hacs

When I click to mylink and then I click Open Link and Ok to “are you sure?” the page return to initial page Open link and so on like a circle.

Go to the Addon page in HA, then click the add-on store.
In the upper right corner click the three dots and select repositories.
Type in GitHub - hacs/addons and click add.
Click close and refresh your page.

I get this message: StoreManager.add_repository’ blocked from execution, no supervisor internet connection

You have a network connection issue.
Often it is the DNs servers that are the issue, so try using 1.1.1 .1 and 8.8.8.8 instead of the ones you have in your DHCP settings in your router.