Using a completely fresh Minecraft install on Pop!_OS 19.04 (Ubuntu based) and installed Forge with the official installer
Installation of Forge works fine, but as soon as i try to start it, it instantly crashes. Tried with latest (28.1.1) and recommended (28.1.0) build. I have started vanilla Minecraft 1.14.4 once before installing Forge of course. Vanilla works fine and isn't crashing.
There are no mods or anything like that installed whatsoever. 100% clean install.
latest.log:
debug.log: