Help me please

Hello guys:D
I downloaded this Switchbot by unpublished and i do not know how to use it.. I read somewhere that the item you want to change needs to be on your top left corner in the first slot of your inventory, i did that and this pops out when i click starten "das switch-item konnte nicht gefunden werden,der Switch-Bot wurde fur den 1. -5. bonus deaktiviert.Wenn es doch im inventar ist dann lege es ins.1. inventar unten rechts hin und gehe zu optionen-->auslesen" i dont know what that means since i do not know german,can someone please help me and teach me how to use it?
Thankyou in advance! <3

You have to put the item in the playe down right.

Now it says "Auf dem slot#1 befindet sich kein item,der Switch-bot wurde auf diesem slot deaktiviert"

That means onslot 1# there is no item so it is now deactivated.

Please take your item and put it on slot 1 of the first site of the inventar. Then you must buy many switchers and now, please put one pack at the bottom of the right side (last slot) and then click "auslesen". I think, then is alright.

Edit: This is a video, that explain the switchbot in english.