Certain visualizations are not displayed or display a message “The linked image cannot be displayed. The file may have been moved, renamed, or deleted. Verify that the link points to the correct file and location.”

This is product defect. It is due to the accented character in the Panel Title.
The inline image that is getting created in HTML schedule has HTML img tag referring to image with Panel Title name which gets incorrectly generated.

This has been reported as a defect in the product.