Failed to connect to Swarm

Failed to connect to Swarm.
tried everything that you have written (does not work)

Hello serjii,

I have a bit more information I would like to gather from you in order to understand this issue.

1.) Can you link me a copy of your DxDiag?
2.) Does this happen in a new blank project in 4.8? Does this only happen with your project?
3.) Does this happen in 4.9?
5.) Can you post a link to the documentation that you say “you have written?”

After I have this information I will continue to investigate this issue.