Getting below error while running Appium to launch the app

[Teja4676]

An unknown server-side error occurred while processing the command. Original error: Cannot start the 'com.gryphonconnect.gryphon' application.
Visit https://github.com/appium/appium/blob/master/docs/en/writing-running-appium/android/activity-startup.md for troubleshooting.
Original error: Error executing adbExec. Original error: 'Command 'C:\Users\Teja\AppData\Local\Android\Sdk\platform-tools\adb.exe -P 5037 -s emulator-5554
shell am start -W -n com.gryphonconnect.gryphon/com.gryphonconnect.gryphon.activities.MainActivity -S' exited with code 255';
Stderr: 'Security exception: Permission Denial: starting Intent { flg=0x10000000 cmp=com.gryphonconnect.gryphon/.activities.MainActivity }
from null (pid=4659, uid=2000) not exported from uid 10094 java.lang.SecurityException: Permission Denial: starting Intent
{ flg=0x10000000 cmp=com.gryphonconnect.gryphon/.activities.MainActivity } from null (pid=4659, uid=2000)
not exported from uid 10094 at com.android.server.am.ActivityStackSupervisor.checkStartAnyActivityPermission(ActivityStackSupervisor.java:1632)
at com.android.server.am.ActivityStarter.startActivity(ActivityStarter.java:438) at com.android.server.am.ActivityStarter.startActivityLocked
(ActivityStarter.java:278) at com.android.server.am.ActivityStarter.startActivityMayWait(ActivityStarter.java:817)
at com.android.server.am.ActivityManagerService.startActivityAndWait(ActivityManagerService.java:4625) at com.android.server.am.ActivityManager
ShellCommand.runStartActivity(ActivityManagerShellCommand.java:412) at com.android.server.am.ActivityManagerShellCommand.onCommand
(ActivityManagerShellCommand.java:141) at android.os.ShellCommand.exec(ShellCommand.java:96) at com.android.server.am.ActivityManagerService.
onShellCommand(ActivityManagerService.java:15014) at android.os.Binder.shellCommand(Binder.java:594) at android.os.Binder.onTransact
(Binder.java:492) at android.app.IActivityManager$Stub.onTransact(IActivityManager.java:4243) at com.android.server.am.ActivityManagerService.onTransact
(ActivityManagerService.java:2919) at android.os.Binder.execTransact(Binder.java:697)'; Code: '255'