error installing Xojo 2019r1.1 in Ubuntu 19.04

Hi Georgios,
I’m currently running Xojo IDE under Mint 20.
I can open and execute projects, speed is ok on my I.3 cpu

Though, the Feedback App will not complete its install due to the same error message of missing libwebkit2-gtk …3 …the vers 4 is installed according to Synaptic…but there is no V.3 installed at all…
cant be satisfied

if any Linux users knows how to fix this - if at all possible - or any other way to complete the xojofeedback App …thanks for any “easy” sugestions :

:penguin: :penguin: :penguin:
Xojo Version installed : Version 2020 R. 1.
PC System: Kernel: 5.4.0-45-generic x86_64
bits: 64 compiler: gcc v: 9.3.0
Desktop: MATE 1.24.0
wm: marco dm: LightDM
Distro: Linux Mint 20 Ulyana
base: Ubuntu 20.04 focal