Changing Photos in GUIDES

[skierb2]

I tried changing the thumbnail photo while submitting my GUIDE trip and the web page gave an error that said:
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TypeError: 'tagName' is null or not an object
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How can I change the GUIDE photo if the two options in the submission screen give an error?
Thanks.

[chris]

Could you please send me a link to the guide so that I can take a look?