I’m working on test automation for apk.
But, I have received these errors:
this is my desired cap:
{
“deviceName”: “Google Pixel 3”,
“platformName”: “Android”,
“app”: apk path
}
I’ve tried many solutions before but nothing solved for now 
Are you using the latest Appium version? What is the Android API level?
Have you tried to provide the main activity name manually as advised in https://github.com/appium/appium/blob/master/docs/en/writing-running-appium/android/activity-startup.md ?
What is the output of adb shell dumpsys window windows after the app has been started?