Android Question B4A - Read a text file from DropBox

[Sabotto]

I would like to make an App that reads a text file that I have on my DropBox.
I downloaded the DonManfred library
but I found many difficulties because it jumps from one post to another due to updates, variations, incompatibilities etc.
At the moment in the code that I created I receive an error towards the end of the compilation referring to this line which is found in the Starter module

Sub Process_Globals
    'These global variables will be declared once when the application starts.
    'These variables can be accessed from all modules.
    Public kvs As KeyValueStore

End Sub

Sub Service_Create
    'This is the program entry point.
    'This is a good place to load resources that are not specific to a single activity.
    kvs.Initialize(File.DirDefaultExternal, "datastore2") '<- - - - - - linea che dà errore
End Sub

Error occurred on line: 16 (Starter)
android.database.sqlite.SQLiteCantOpenDatabaseException: unknown error (Sqlite code 14 SQLITE_CANTOPEN): Could not open database, (OS error - 2:No such file or directory)
at android.database.sqlite.SQLiteConnection.nativeOpen(Native Method)... ecc ecc

In addition, the manifest file of the app must be updated with a piece of xml, this

AddApplicationText(<activity
android:name="com.dropbox.core.android.AuthActivity"
android:configChanges="orientation|keyboard"
android:launchMode="singleTask" >
<intent-filter>
<data android:scheme="db-xxx" />
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.BROWSABLE" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>)

If you want I can attach the zip of the project but you need the libraries to test, which are the following: