AttributeError: 'AndroidBridge' object has no attribute '_test_devices'

[vimisms]

Configured buildozer.spec as mentioned in the below:

https://github.com/MichaelStott/KivMob

but getting this when I try to show a simple banner ad:

07-12 18:19:06.466 5839 5839 I python : Traceback (most recent call last):
07-12 18:19:06.466 5839 5839 I python : File "/home/vimis/color/.buildozer/android/platform/build-arm64-v8a_armeabi-v7a/build/python-installs/colormatch/arm64-v8a/android/runnable.py", line 38, in run
07-12 18:19:06.466 5839 5839 I python : File "/home/vimis/color/.buildozer/android/platform/build-arm64-v8a_armeabi-v7a/build/python-installs/colormatch/arm64-v8a/kivmob.py", line 221, in init
07-12 18:19:06.466 5839 5839 I python : File "jnius/jnius_export_class.pxi", line 1150, in jnius.jnius.JavaMultipleMethod.call
07-12 18:19:06.466 5839 5839 I python : jnius.jnius.JavaException: No static methods called initialize in com/google/android/gms/ads/MobileAds matching your arguments, requested: (<org.kivy.android.PythonActivity at 0x735cb3a520 jclass=org/kivy/android/PythonActivity jself=<LocalRef obj=0xd12a at 0x735d20bf90>>, 'ca-app-pub-3940256099942544~3347511713'), available: ['(Landroid/content/Context;)V', '(Landroid/content/Context;Lcom/google/android/gms/ads/initialization/OnInitializationCompleteListener;)V']
07-12 18:19:06.466 5839 5883 I python : [INFO ] [KivMob ] new_banner() called.
07-12 18:19:06.472 5839 5883 I python : [INFO ] [KivMob ] request_banner() called.
07-12 18:19:06.473 5839 5883 I python : [INFO ] [KivMob ] show_banner() called.
07-12 18:19:06.485 5839 5839 I python : Traceback (most recent call last):
07-12 18:19:06.485 5839 5839 I python : File "/home/vimis/color/.buildozer/android/platform/build-arm64-v8a_armeabi-v7a/build/python-installs/colormatch/arm64-v8a/android/runnable.py", line 38, in run
07-12 18:19:06.485 5839 5839 I python : File "/home/vimis/color/.buildozer/android/platform/build-arm64-v8a_armeabi-v7a/build/python-installs/colormatch/arm64-v8a/kivmob.py", line 259, in request_banner
07-12 18:19:06.486 5839 5839 I python : File "/home/vimis/color/.buildozer/android/platform/build-arm64-v8a_armeabi-v7a/build/python-installs/colormatch/arm64-v8a/kivmob.py", line 329, in _get_builder
07-12 18:19:06.486 5839 5839 I python : AttributeError: 'AndroidBridge' object has no attribute '_test_devices'
07-12 18:19:06.516 5839 5883 I python : [INFO ] [GL ] NPOT texture support is available
07-12 18:19:06.550 5839 5883 I python : [WARNING] [Base ] Unknown provider
07-12 18:19:06.550 5839 5883 I python : [INFO ] [Base ] Start application main loop

[callumpurcell1]

Also getting this error