I have uploaded the sketch and am getting the following message - can anyone help? avrdude: ser_open(): can't open device "\.\COM1": The system cannot find the file specified.

HELP error message - school prject needs to be in for tomorrow!

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avrdude: ser_open(): can't open device "\\.\COM3": The system cannot find the fi IDE 1.x	2	3137	May 5, 2021
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