(SOLVED) External command finished with errors (Installation Failed)

I was wondering if it is working since you installed EndeavourOS?

Yes.
The wifi is working just fine!

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I was just checking because you have the Ralink RT3090 Wireless 802.11n 1T/1R PCIe driver: rt2800pci and for some it has been problematic for them. Looks like yours may be newer hardware as i see it is PCI-e and using the correct module rt2800pci.