obviously there's a problem with exporting to mobile in Godot 3.3, which I encountered as well. 3.2.3 works flawlessly, but after three days I'm running out of ideas.
'apksigner' returned with error #1 is all I ever get.
I basically fresh-downloaded and installed everything related (open-jdk, android-studio, godot itself, except for windows...) and tried anything I could find on the net, but somewhere I have to be missing something.
After going through all this a year ago when I started with Godot I was sure I'd be able to set it up rather easily this time, but now I'm asking for help (along many other, as it seems). Can anybody provide a (still) beginner-friendly step by step approach for this? (These two couldn't help me this time around: https://docs.godotengine.org/en/stable/getting_started/workflow/export/exporting_for_android.html#doc-exporting-for-android
A lot to ask for, I know, but despair is forcing me... any help would be much appreciated.