I cannot use other installations of Minecraft since the new update.

I cannot use older installation of Minecraft, I can only use 1.16.2 and because a server I use is on the 1.16.1 version, I cannot join it. Adittionally when I click the "+ new installations" button, and click on the button to select the version, nothing is selected. It is as if I did not click on it at all. I attached a picture of the page with the version button I cannot click.