Jamil, please run this command to check which version you have:
dpkg -s mutter | grep Version
It should say 3.36.2-1ubuntu1~20.04.1 or higher.
Jamil, please run this command to check which version you have:
dpkg -s mutter | grep Version
It should say 3.36.2- 1ubuntu1~ 20.04.1 or higher.