You try to change your club in tournament, but nothing happens when you click on "Change":

You are probably using a popup blocker and therefore the popup below is not visible:

Check if a popup blocker is active in the browser and set the setting to inactive:
- Click on the three dots or the hamburger menu in the top right of your browser;
- Go to Settings;
- Choose Privacy and Security;
- Click on Site Settings;
- Scroll to Pop-ups and redirects;
- If it's on "Blocked," the pop-up blocker is active.
- Then put it on inactive.
You may also be using a specific extension or other popup blocker. You must then deactivate it.