If you are seeing this error:
"One or more actions are not bound to a key"
Check that all your actions are bound before playing.
- Log into the account using the proper Gamertag
- Navigate to Options & Career
- Navigate to Settings
- Select Controls
- Select Configure Mouse & Keyboard
- Select Configure Bindings
- Scroll through the list and make sure each action is bound to a key
Alternative method if the above does not work:
- Log into the account using the proper Gamertag
- Navigate to Options & Career
- Navigate to Settings
- Select Controls
- Select Configure Mouse & Keyboard
- Press the Restore Default Settings button
- Select Restore and back out of the menu to save
Note: The alternate method will clear and reset keybindings for every game in Halo: The Master Chief Collection and is only recommended if you cannot figure out the missing keybinding or would like to restore to default settings.