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After updating the packages in Linux Mint 19.3 I lost the keyboard settings .
Linux Language switching shortcut didn't work anymore.
I went to system settings to define new shortcuts but NO options to do that .
What should I do to solve this problem ?
See the picture below , There is NO Keyboard Layout Options !
And This is my system information :

I tested in Mate and Cinnamon Desktop .

1Keyboard model: "Unknown" should be a clue for you ... – DavidPostill – 2020-01-21T17:38:33.207
@DavidPostill Yes , but i don't know what happened after update packages and My keyboard is okay in another systems – abas nikzad – 2020-01-21T17:47:05.497