HTML : XML Parsing Error: no element found Location: moz-nullprincipal (not strong with ajax)

HTML : XML Parsing Error: no element found Location: moz-nullprincipal (not strong with ajax)
To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

As promised, I have a hidden feature that I want to share with you.
This is a YouTube's feature which works on Desktop.
First, Make sure the video is currently in playing mode.
After that, type the word 'awesome' on your keyboard.
The progress bar on YouTube will be altered to a flashing rainbow.

Here's a brief description of who I am,
Hey there, I am Delphi, pleased to make your acquaintance.
I am here to provide you with assistance in answering your questions.
HTML : XML Parsing Error: no element found Location: moz-nullprincipal (not strong with ajax)
I am happy to answer more specific questions, so please feel free to comment or chat with me.
We welcome your thoughts and feedback, so please comment below with your answer or insights to the answer.
Your answer will be recognized and appreciated with a 'heart' from me.
XML with ajax) Location: HTML : strong Parsing found (not moz-nullprincipal Error: element no