With EasyOS 5.4.8 I installed the Chrome Browser with Flapi and Flathub. This was a customized installation and worked good.
After that, I noticed the update to 5.4.9 and installed that too. Reboot and all was fine.
But then I tried to make a custom installation with the Tor Browser Launcher in Flapi. I filled in the data like before with Chrome. Flapi opened the correct website in the browser, I clicked okay and went on. But when the Flapi app came back, I did not find the Tor Browser Launcher in the apps and I could not install it. I tried this with several other apps from Flathub with the same result – no installation.
Next, I tried to install Spotify, which has a predefined entry in Flapi. This worked well.
At last, I started a terminal and made a manual flatpak installation with the Tor Browser Launcher. This worked without problems. The Tor Browser runs pretty well, I commented out the lines in the startup-script for the “non-root-user” and all is fine.
It seems, that Flatpak itself works normal. But Flapi only worked with the predefined apps without any customization. That is no issue for me. I often work with the terminal and I like it. Flapi is not important for me.
I really don't know why this happened in Flapi. There was nothing changed in my system between the update and the next try with Flapi.