The QT wallet does not start

The QT wallet does not start:

./bitcoin-qt в ubuntu 20.04?  qt.qpa.plugin: Could not find the Qt platform plugin "offscreen" in ""                                                  This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.                                                                                                         Available platform pl

tell me how to solve the problem? I installed dependencies with githab bitcoin core.