Up to 2 attachments (including images) can be used with a maximum of 524.3 kB each and 1.0 MB total.
Thanks for posting.
Could you tell us your skill ID for further investigation?
1 Person is following this question.
Account linking between Alexa Skill and AWS IoT
Account linking setup
Alexa dosn't invoke Smart Home Lambda function
Smart Home Skill tutorials and examples seem to be out of date
Unable to link your Skill. Please try again later.