i encountered the same yesterday, Here is the solution.
1- Open epic games
2- Click unreal engine on the left hand bar
3- Click on library
4- Next to launch button you will se a drop down button
5- Click on Options
It should look like this-
6- Select the next 3 options i.e. till 4
7- Click apply.
since I am new user, so I can only put one image otherwise would have uploaded all the steps.
Hope it helps!