Library header errors when uploading a sketch

I've tried hard to locate where to post this -sorry if its the wrong place!

I am trying to setup and run the blink sketch to test an ESP32WROOM which is attached to a Chromebook with the Ardiono IDE installed and running ok. When I 'upload' the sketch it produces the compilation error message below. I have spent a whole day trying to solve this -I surrender, please could someone help me!

Blockquote

Arduino: 1.8.16 (Linux), Board: "ESP32 Dev Module, Disabled, Default 4MB with spiffs (1.2MB APP/1.5MB SPIFFS), 240MHz (WiFi/BT), QIO, 80MHz, 4MB (32Mb), 921600, Core 1, Core 1, None"

exec: "python": executable file not found in $PATH
Error compiling for board ESP32 Dev Module.
Invalid library found in /home/utopistmaker/Arduino/libraries/Blink: no headers files (.h) found in /home/utopistmaker/Arduino/libraries/Blink

Blockquote

Does this help.

That just means you have a library directory named "Blink" but there are no '.h' files in the directory. You can ignore the message or fix it by deleting the directory:
/home/utopistmaker/Arduino/libraries/Blink

Thanks, especially given that this reveals my ineptitude!