Reply To: Keyboard Shortcuts not working

Veronique, try:

1. Edit->Keyboard Shortcuts->Set: choose [Default] (or your preferred set)

If you don’t get a better answer here,

2. Reset your preferences
3. Uninstall then reinstall InDesign (Creative Cloud application if you are running CC)

For more details about which other preferences you will lose, and backing them up, see:
https://helpx.adobe.com/indesign/using/setting-preferences.html
Scroll down to: Restore all preferences and default settings

(Windows) Start InDesign, and then press Shift+Ctrl+Alt. Click Yes when asked if you want to delete preference files.
(Mac OS) While pressing Shift+Option+Command+Control, start InDesign. Click Yes when asked if you want to delete preference files.