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I built the firmware according to the official tutorial. And I got the file 'espruino_2v01.56_esp32.tgz'.
Then I decompressed it and flash the files(bootloader.bin, partitions_espruino.bin, espruino_esp32.bin) to the ESP32.
But when I use screen to monitor the ESP32, I got the error in the picture.
Espruino
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
It works, thank you for help @Wilberforce !