Hi Bart,
Logging in locally
If you have a keyboard connected, you can log in locally by exiting Kodi:
Navigate to the power icon in Kodi
Select Exit/Quit
Wait for the OSMC splash screen to appear
Press ESC on your keyboard
Login to your device using osmc for the username and password.
from: Accessing the command line - General - OSMC .
Something isn’t right if ssh isn’t working, It may be worth providing debugging logs. So we can try and work out whats going on:
Providing diagnostic logs
Logs are needed so we can identify problems quickly. A full set of logs should be uploaded with ease via My OSMC.
Before uploading any logs, you should ensure that Debugging is enabled in Kodi. This can be done by going to Settings -> System -> Logging -> and selecting Enable Debugging. You should then perform a reboot of your device and perform only the minimum actions required to replicate this issue so that it is easy to identify the cause of the problem.
If you are using the default OSMC skin, then My OSMC will be accessible via your Home screen. If you are using Confluence then it will be available via the Settings sub-menu. For other skins, My OSMC can be found via the Programs section. Before doing so, you should read the rest of this article.
After opening My OSMC, navigate to Logs.
Thanks Tom.