Bug: error displaying the "leave" button after exiting the tournament

[Natalia-hub4]

Short description: |
error displaying the "leave" button after exiting the tournament ​
Prerequisites:

1. Go to the main page of the game https://codebattle.hexlet.io/
2. authorized user
   Steps to reproduce:
3. click on the "Tournaments" button
4. choose an active tournament
5. click on the "Show" button
6. click on the "Join" button
7. click on the "leave" button
   Expected result: |
   the "leave" button is highlighted in red and changes in the name to "join"
   Actual result: |
   error, the "leave" button is not highlighted in red and does not change the name to "join"
   Browsers: Google Chrome, version 24.10.2.706 (64-bit).
   OPERATING system: Windows 11, version 21 H2
   Code battle from the Hexlet community Current version: ddf1389