Rocket-loader.min.js:1 Uncaught DOMException: Failed to execute 'setAttribute' on 'Element': 'ondersteunen."' is not a valid attribute name


#1

The product image won’t load only on one specific page (https://www.amanvida.eu/nl/ladrome-propolis-gommetjes-bio) giving an error in all browsers:
rocket-loader.min.js:1 Uncaught DOMException: Failed to execute ‘setAttribute’ on ‘Element’: ‘ondersteunen."’ is not a valid attribute name.
I cannot figure out what is causing this. Please help.


#2

Never mind. I figured it out. There was some where in the text extra quotation marks which I had to remove next to the word ondersteunen.