To fix a missing transcript error, you will need to create a transcript for any of the video or audio clips that have been flagged as missing a transcript. Once you have created the transcript, you can either add the transcript content directly within your post or page or link to the transcript if you're including it as a downloadable doc or PDF file.
To fix incorrect heading order errors, you will need to either change the incorrect heading level to the correct heading level, or add content with the correct heading level in between the two already existing levels.
To fix this error, you will need to add missing alt text to any area tags that do not have alt text. The alt text needs to describe the function of the link contained in the area.