I have been trying to flash a nodemcu board with the firmware and file image provided. At first I was unable to get the computer to recognize the esp but through searching online I found that a self powered usb hub was needed. With the self powered usb hub I can now get the esp tool to see my esp, however, during the flashing process it gets stuck on "Stub running..." I have tried numerous computers, esp's, cables, and times with no luck. How can I get the firmware loaded onto this ESP?

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