Pong demo in Android cannot load scene

:information_source: Attention Topic was automatically imported from the old Question2Answer platform.
:bust_in_silhouette: Asked By eiselekd

I’m new to Godot and try get the “Pong with GDScript” example to
run in Android. Export and install seems to work and I can see that
inside the generated .apk the resources are available:

  ...
  -rw-rw-rw-     32428  27-Sep-2020  15:05:06  res/mipmap/icon_foreground.png                                                                                                         
  -rw-rw-rw-     51676  27-Sep-2020  15:05:06  resources.arsc                                                                                                                         
  -rw-rw-rw-       148  27-Sep-2020  15:05:06  assets/.import/ball.png-9a4ca347acb7532f6ae347744a6b04f7.stex                                                                          
  -rw-rw-rw-       641  27-Sep-2020  15:05:06  assets/ball.png.import                                                                                                                 
  -rw-rw-rw-       956  27-Sep-2020  15:05:06  assets/.import/icon.png-487276ed1e3a0c39cad0279d744ee560.stex                                                                          
  -rw-rw-rw-       640  27-Sep-2020  15:05:06  assets/icon.png.import                                                                                                                 
  -rw-rw-rw-       154  27-Sep-2020  15:05:06  assets/.import/left_pallete.png-bc33611074a0f886142e37c77bd2545a.stex                                                                  
  -rw-rw-rw-       665  27-Sep-2020  15:05:06  assets/left_pallete.png.import                                                                                                         
  -rw-rw-rw-       505  27-Sep-2020  15:05:06  assets/logic/ball.gdc                                                                                                                  
  -rw-rw-rw-       328  27-Sep-2020  15:05:06  assets/logic/ceiling_floor.gdc                                                                                                         
  -rw-rw-rw-      1035  27-Sep-2020  15:05:06  assets/logic/paddle.gdc                                                                                                                
  -rw-rw-rw-       222  27-Sep-2020  15:05:06  assets/logic/wall.gdc                                                                                                                  
  -rw-rw-rw-      3428  27-Sep-2020  15:05:06  assets/pong.tscn                                                                                                                       
  -rw-rw-rw-       154  27-Sep-2020  15:05:06  assets/.import/right_pallete.png-fc6e4a6a7c8197834656482b94708e47.stex                                                                 
  -rw-rw-rw-       668  27-Sep-2020  15:05:06  assets/right_pallete.png.import                                                                                                        
  -rw-rw-rw-       151  27-Sep-2020  15:05:06  assets/.import/separator.png-f981c8489b9148e2e1dc63398273da74.stex                                                                     
  -rw-rw-rw-       656  27-Sep-2020  15:05:06  assets/separator.png.import                                                                                                            
  -rw-rw-rw-        37  27-Sep-2020  15:05:06  assets/logic/ball.gd.remap                                                                                                             
  -rw-rw-rw-        46  27-Sep-2020  15:05:06  assets/logic/ceiling_floor.gd.remap                                                                                                    
  -rw-rw-rw-        39  27-Sep-2020  15:05:06  assets/logic/paddle.gd.remap                                                                                                           
  -rw-rw-rw-        37  27-Sep-2020  15:05:06  assets/logic/wall.gd.remap                                                                                                             
  -rw-rw-rw-       583  27-Sep-2020  15:05:06  assets/icon.png                                                                                                                        
  -rw-rw-rw-      4561  27-Sep-2020  15:05:06  assets/project.binary                                                                                                                  
  -rw-rw-rw-        62  27-Sep-2020  15:05:06  assets/_cl_                                                                                                                            
- ----------  --------  -----------  --------  ---------------------------------------------------------------------------------------------                                          
              128321823                         378 files                                                                                                                             
                                                                            

However whe I try to start the “Pong with GDScript” app in the
launcher the Godot logo shows up and then it flickers a few times and
the app exits.

I can see in logcat:

11-11 12:30:58.132  9612  9638 E godot   : **ERROR**: Failed loading resource: /pong.tscn.
11-11 12:30:58.132  9612  9638 E godot   :    At: core/io/resource_loader.cpp:278:_load() - Condition "found" is true. Returned: RES()
11-11 12:30:58.132  9612  9638 E godot   : **ERROR**: Failed loading scene: /pong.tscn
11-11 12:30:58.132  9612  9638 E godot   :    At: main/main.cpp:1936:start() - Condition "!scene" is true. Returned: false
11-11 12:30:58.189  9612  9638 E godot   : **ERROR**: Condition "default_certs != __null" is true.
11-11 12:30:58.189  9612  9638 E godot   :    At: modules/mbedtls/crypto_mbedtls.cpp:201:load_default_certificates() - Condition "default_certs != __null" is true.
11-11 12:30:58.189  9612  9638 E godot   : **ERROR**: Cannot open file '/pong.tscn'.
11-11 12:30:58.189  9612  9638 E godot   :    At: scene/resources/resource_format_text.cpp:1228:load_interactive() - Condition "err != OK" is true. Returned: Ref<ResourceInteractiveLoader>()

It seems like the resources cannot be loaded?
What am I doing wrong?