Built game crashes on ubuntu 18.04

Hi, my game runs fine in the editor but it crashes when launched after packaging with this error:

4.20.2-0+++UE4+Release-4.20 516 0

Disabling core dumps.

LowLevelFatalError [File:Unknown] [Line: 135]

ICU data directory was not discovered:



Signal 11 caught.

Malloc Size=131076 LargeMemoryPoolOffset=131092

CommonUnixCrashHandler: Signal=11

Malloc Size=65535 LargeMemoryPoolOffset=196655

Malloc Size=84512 LargeMemoryPoolOffset=281184

Malloc Size=68112 LargeMemoryPoolOffset=349312

Malloc Size=131076 LargeMemoryPoolOffset=480404

LowLevelFatalError [File:Unknown] [Line: 511]

Error copying clipboard contents: Video subsystem must be initialized to set clipboard text

Malloc Size=131160 LargeMemoryPoolOffset=611592

Malloc Size=131160 LargeMemoryPoolOffset=742776

Malloc Size=131160 LargeMemoryPoolOffset=873960

Engine crash handling finished; re-raising signal 11 for the default handler. Good bye.

How can I fix this?