Android Question Error when running the app

[Almog]

Hello,

I tried to create simple app using Bluetooth , but when runnung the code, this error has occurred:

ERROR: In <declare-styleable> FontFamilyFont, unable to find attribute android:fontVariationSettings
ERROR: In <declare-styleable> FontFamilyFont, unable to find attribute android:ttcIndex

Does anybody know what is the problem and how to fix it?

Thanks in advance

 

[DonManfred]

- Use the B4A SDK Manager to update all recommended items.
- Change Android.jar to be the one from SDK 28. Tools-Configure paths...

 

[Almog]

- Use the B4A SDK Manager to update all recommended items.
- Change Android.jar to be the one from SDK 28. Tools-Configure paths...

Thanks