nothing works

[EspoiRka]

Hello. I was looking for an example of an application for sending files to a PC, I found this... I put the project in android studio, turn on debugging on my pixel 6 pro and get an error when I turn on device search.

Process: com.logigear.bluetooth_file_transfer, PID: 13128 java.lang.SecurityException: Permission Denial: starting Intent { act=android.bluetooth.adapter.action.REQUEST_DISCOVERABLE cmp=com.android.settings/.bluetooth.RequestPermissionActivity (has extras) } from ProcessRecord{b84bbba 13128:com.logigear.bluetooth_file_transfer/u0a304} (pid=13128, uid=10304) requires android.permission.BLUETOOTH_CONNECT at android.os.Parcel.createExceptionOrNull(Parcel.java:2426) at android.os.Parcel.createException(Parcel.java:2410) at android.os.Parcel.readException(Parcel.java:2393) at android.os.Parcel.readException(Parcel.java:2335) at android.app.IActivityTaskManager$Stub$Proxy.startActivity(IActivityTaskManager.java:2328) at android.app.Instrumentation.execStartActivity(Instrumentation.java:1758) at android.app.Activity.startActivityForResult(Activity.java:5410) at androidx.activity.ComponentActivity.startActivityForResult(ComponentActivity.java:597) at android.app.Activity.startActivityForResult(Activity.java:5368) at androidx.activity.ComponentActivity.startActivityForResult(ComponentActivity.java:583) at android.app.Activity.startActivity(Activity.java:5754) at android.app.Activity.startActivity(Activity.java:5707) at com.logigear.bluetooth_file_transfer.MainActivity.enterScanningMode(MainActivity.kt:263) at com.logigear.bluetooth_file_transfer.MainActivity.onCreate$lambda-0(MainActivity.kt:126) at com.logigear.bluetooth_file_transfer.MainActivity.$r8$lambda$ACcRNjkcA5vExfAorDoDhAHnhXE(Unknown Source:0) at com.logigear.bluetooth_file_transfer.MainActivity$$ExternalSyntheticLambda0.onClick(Unknown Source:2) at android.view.View.performClick(View.java:7455) at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:1119) at android.view.View.performClickInternal(View.java:7432) at android.view.View.access$3700(View.java:835) at android.view.View$PerformClick.run(View.java:28810) at android.os.Handler.handleCallback(Handler.java:938) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loopOnce(Looper.java:201) at android.os.Looper.loop(Looper.java:288) at android.app.ActivityThread.main(ActivityThread.java:7870) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003) Caused by: android.os.RemoteException: Remote stack trace: at com.android.server.wm.ActivityTaskSupervisor.checkStartAnyActivityPermission(ActivityTaskSupervisor.java:1059) at com.android.server.wm.ActivityStarter.executeRequest(ActivityStarter.java:983) at com.android.server.wm.ActivityStarter.execute(ActivityStarter.java:672) at com.android.server.wm.ActivityTaskManagerService.startActivityAsUser(ActivityTaskManagerService.java:1243) at com.android.server.wm.ActivityTaskManagerService.startActivityAsUser(ActivityTaskManagerService.java:1215)

It was android 12. Okay. I'm trying to run on android 9. Everything started, the search went. I didn't run it on my phone, but on a device to read the product... But also an android. And when you try to send a file, nothing is available in Explorer. Everything is gray. Ie, I turned on the search, found pixel 6 pro, chose to send a file and nothing...nothing can be selected. I chose a different transmission method, through a different conductor, and not the standard one. And I get this error when choosing.
E/AndroidRuntime: FATAL EXCEPTION: main Process: com.logigear.bluetooth_file_transfer, PID: 27374 java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=111, result=-1, data=Intent { act=android.intent.action.SEND dat=content://com.amaze.filemanager.debug/storage_root/storage/emulated/0/app-debug.apk typ=apk flg=0x1 }} to activity {com.logigear.bluetooth_file_transfer/com.logigear.bluetooth_file_transfer.FilePickerActivity}: java.lang.IllegalArgumentException: column '_data' does not exist. Available columns: [] at android.app.ActivityThread.deliverResults(ActivityThread.java:4391) at android.app.ActivityThread.handleSendResult(ActivityThread.java:4433) at android.app.servertransaction.ActivityResultItem.execute(ActivityResultItem.java:49) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1836) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:193) at android.app.ActivityThread.main(ActivityThread.java:6702) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:911) Caused by: java.lang.IllegalArgumentException: column '_data' does not exist. Available columns: [] at android.database.AbstractCursor.getColumnIndexOrThrow(AbstractCursor.java:340) at android.database.CursorWrapper.getColumnIndexOrThrow(CursorWrapper.java:87) at com.logigear.bluetooth_file_transfer.helper.FilePickerHelper$Companion.getDataColumn(FilePickerHelper.kt:86) at com.logigear.bluetooth_file_transfer.helper.FilePickerHelper$Companion.getPath(FilePickerHelper.kt:65) at com.logigear.bluetooth_file_transfer.FilePickerActivity.onActivityResult(FilePickerActivity.kt:86) at android.app.Activity.dispatchActivityResult(Activity.java:7454) at android.app.ActivityThread.deliverResults(ActivityThread.java:4384) at android.app.ActivityThread.handleSendResult(ActivityThread.java:4433)  at android.app.servertransaction.ActivityResultItem.execute(ActivityResultItem.java:49)  at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)  at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1836)  at android.os.Handler.dispatchMessage(Handler.java:106)  at android.os.Looper.loop(Looper.java:193)  at android.app.ActivityThread.main(ActivityThread.java:6702)  at java.lang.reflect.Method.invoke(Native Method)  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:911) 

I don't understand anything about Kotlin and I don't speak English, but know that there is such a problem. Thanks.