I started the fully new solution, everything was OK. The browser opened http://localhost:22742/swagger/index.html.
Clicked the button "Authorize", logined successfully, and the button changed into "Logout".
Used the RAD Tool to generate some entities, some errors happened. so I deleted the whole solution from the disk and deleted the database . but I didn't closed the browser.
Unzipped the solution archive again and repeat 1), the browser opened a new page of http://localhost:22742/swagger/index.html. Jokely, the new page showed a button "Logout" without any login action. When clicked this button, there was no response.