Can't type anything inside editor

OS: Ubuntu 16.04. UE4: 4.16, 4.17, 4.18

I have tried to install three version of the engine with PC, Laptop and Server. All have the same problem which I can’t type anything inside the Editor; however, when I click on something and I hit backspace it can delete it! just cannot input anything.

I followed Building on Linux wiki link by first install ubuntu dependencies and then proceeded with first time setup.

Hello,

We’ve recently made a switch to a new bug reporting method using a more structured form. Please visit the link below for more details and report the issue using the new Bug Submission Form. Feel free to continue to use this thread for community discussion around the issue.

https://epicsupport.force.com/unrealengine/s/

Thanks