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Check "Setting up Lighting Connect" Trailhead giving the following Error message
Challenge not yet complete... here's what's wrong:
There was an unexpected error while verifying this challenge. Usually this is due to some pre-existing configuration or code in the challenge Org. We recommend using a new Developer Edition (DE) to check this challenge. If you're using a new DE and seeing this error, please post to the developer forums and reference error id: YCKXBVFD
Even I have done the same using a new DE. GIving the Same Error
There was an unexpected error while verifying this challenge. Usually this is due to some pre-existing configuration or code in the challenge Org. We recommend using a new Developer Edition (DE) to check this challenge. If you're using a new DE and seeing this error, please post to the developer forums and reference error id: YCKXBVFD
Even I have done the same using a new DE. GIving the Same Error
Can you check if your DE Org does not have a namespace or you have used any wrong CSS class name.
Even i had faced this issue but new DE worked for me
Thanks
Anand
Sandeep