Build a Personal Portfolio Webpage one error

I have complied with the user requirements and cross checked with the sample portfolio page code. But still unable to debug One error.
11 cases (out of 12) are completed according to the script.
Help me debug and find what is the 12th case that is giving error.

Chrome Browser

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36.

Link to the challenge:

okay. so with a nice debugging session it was solved. apparently had multiple spell errors which created mismatch between the html and css files.
Tea (or Coffee) does help.