My v1.2.2.2 Syncthing on Android 9 (LineageOS 16.0-20190815-NIGHTLY-sailfish) does not start either. An error message Syncthing keeps stopping pops up with a “Close app” button. I’ve been running Syncthing on my Android phones flawlessly for years, so this is a big surprise. I’m not really sure how to offer any more information about the problem since I don’t know where log information goes. The phone is a Pixel. The app is installed via F-droid. Any help would be appreciated. In the meantime, I’ll try to install a previous version.
By the way, I am thrilled that my contributed image of the tree from years ago is still used for the F-droid app banner image 