MKR1000 usb-incoming-port

I am new to Arduino. My MKR1000 was working well till two days ago. I have been using a temperature sensor with it. But I am unable upload the sketch now as the the error display indicates bluetooth-incoming -port instead of usb-incoming-port. The choice of usb port is also missing from the WiFi101/WiFiNINA Firmware Certificate Updater. Please help. Please also help with using the WiFi. Thanks. I get this error message while trying to upload:

Arduino: 1.8.12 (Mac OS X), Board: “Arduino MKR1000”

fork/exec /Users/kapilchandrasekhar/Library/Arduino15/packages/arduino/tools/arm-none-eabi-gcc/7-2017q4/bin/arm-none-eabi-g++: no such file or directory
Error compiling for board Arduino MKR1000.

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Can you please let us know if the issue you're facing is solved now or not?