Arduino Nano 33 BLE Compile Error Help

Official Hardware Nano Family Nano 33 BLE
4

I find the solution in the forum. Here is the link

Go to File-Preferences. Click on more preferences can be edited ... C: \ Users \ user \ AppData \ Local \ Arduino15 \ Preferences.txt.
Close Arduino IDE.
Open the Preferences.txt and delete all the content and save it empty.
This will automatically correct the preferences when you open the Arduino IDE

Then, reinstall the Arduino Mbed OS Nano board in the Boards Manager.