I installed Tribler through the Pamac installer on Manjaro 19.0.2 but when I try and launch Tribler it shows it starting then just goes away?
same for me. Fresh Manjaro install. Tribler 7.4.4-2 from official Manjaro community Repository
Posted over on the Manjaro forum also, you may want to add to it as well.
Run this in terminal and it should then work fine:
pamac install python-pyasn1