Black screen (blinking _)

Briefly describe your issue below:

GUI does not start. Just _ blinking. I tried to execute startx but I receive: (screenshot)
Also in Xorg.0.log:
Fatal server error:
Cannot run in framebuffer mode. Please specify busIDs for all framebuffers devices

What version of Parrot are you running? (include version, edition, and architecture)
Linux parrot 4.18.0-parrot10-amd64 #1 SMP Debian 4.18.10-1parrot10 (2018-10-06) x86_64 GNU/Linux

What method did you use to install Parrot? (Debian Standard / Debian GTK / parrot-experimental)
Debian GTK

Only Parrot OS is installed on the system