CHIRP

Sorry, but this bug report is too skinny, we need details.
Which radio (exact model) are you using? What were you doing when the error popped up?
Please refer to the Wiki "How To Report Issues" and provide a debug log. Thanks!

Which radio (exact model) are you using? KD-C1
What were you doing when the error popped up? click the radio on chirp app, and popped up other window page and i choose the right category then click ok, after that error popped up.

This looks like a possible cable issue. Please refer to these Wiki articles:
CableGuide
CableGuide FTDI OEM Cables
[RTSystemsCablesAndMavericks]
Please check whether these can help you with your problem.

This radio is a variant of the Retevis RT22.
Duplicates #6747. Please follow and post there. Thanks!