If physics is generally working but the wake is not, make sure that foam is visible in the material settings. If that doesn't help, try adding the ocean physics again. It's possible that you accidentally removed one of the parameters.

If your ocean has white textures, it is most likely due to incorrect mathematical nodes, which are present in older versions of Blender. To fix this, run the add-on on Blender version 3.4 or higher and recreate the ocean.

To install an add-on, you follow the same steps as with any other. Download the .zip file and leave it as is. Then, open Blender and go to the Edit > Preferences > Add-ons > Install menu. Choose the .zip file and, finally, make sure that RealOcean is checked in the list of add-ons. Have fun!