Apex legends Game Menu Stuck on select mode

Here's what worked for me on Windows 10 PC! I renamed several directories (folders) from cache to cashe. This basically makes Origin (or Apex?) reload/restore corrupted cache data.

1. Shut down Apex, and also Origin game launcher if it's running. (Some people just run Apex by itself, others use Origin game launcher to start Apex.)

2. Run a command prompt window at administrator level. (Click Windows button at lower left, type in "cmd", click option that says "Run As administrator".)

3. Type in a bunch of commands (or you can do this rename thing using File Explorer? But I'm old-school so these instructions are too):
    3.1 cd "\Users\{your user name here}\AppData\Local\Origin\Origin"
    3.2 rename cache cashe
    3.3 cd "\Users\{your user name here}\AppData\Local\Origin\Origin\cashe\QtWebEngine\Default"
    3.4 rename Cache Cashe
    3.5 cd "\Users\{your user name here}\AppData\Local\Origin\Origin\QtWebEngine\Default\Application Cache"
    3.6 rename Cache Cashe

4. Launch Origin (if that's how you normally do it, otherwise skip this step)

5. Launch Apex, go past the title screen and into the lobby

6. You'll see SELECT again at the lower left, go in there and select your game mode and when you get back to the lobby the button should change to READY.  Click it and play!

Probably just steps #3.1 and #3.2 would have worked? But I did all of the 3.x steps.

Note:
Application data gets stored in several different places in Windows 10, hopefully yours is like mine and it's all in \Users\{your user name here}\AppData\Local\Origin. Otherwise you'll need to find Origin's cache folders (directories) on your machine and rename them.

If all those cache directories get restored, which they should, then you can probably go back and delete all the cashe/Cashe directories since they've been replaced.