I often run into the problem where the Trading Post window is blank. To fix it, I clear the Trading Post cache as described in the Troubleshooting Trading Post Errors support page. The problem is that I have to do this every few days.
I'm running the game in Linux Mint 21 using Lutris/Wine.
Does anyone else have this issue with the Trading Post cache? Is there a more permanent solution?
Update 2022-09-21: I don't know if it's a coincidence, but I migrated my system from Linux Mint 21 to Nobara 36 and I haven't had any trading post issues since then.