some answers suggest that this bug refers to GitHub and claimed it as solved.
However both ways are failing from inside obsidian and from browser !
[!FAQ] where to find PlugIns and how to install them?
As I am a newbie at this forum, I might have missed some points.
as by today 2022-06-15T22:00:00Z the issue seems stll to be not solved. — Any helpful suggestions?
To check for errors, first open the developer tools by pressing Ctrl-Shift-I on Windows/Linux or Cmd-Opt-I on macOS, and then go to the “Console” tab. If you want to save the error to a log file, you can right click on the error and choose “Save as…”.
That the callout syntax is not working on this forum is not surprising, Obsidian is one of the few that support that.
Then something in your network(Router, Firewall, PiHole or similar) is blocking access.
Your ISP(Internet Service Provider) could also block it, but I have not heard of that happening anywhere in the german speaking countries(I assume you are located in one, based on the Language set in Firefox)
Okay, its most likely that there is some software blocking the access to the URL I mentioned previously,
typically Anti Virus software, or something similar.
It is possible to sign in with multiple devices.
Please keep in mind that the accounts for this forum and the main site are different & not connected.