See this post!
If you cannot understand what is missing from your formula, assuming I notify you that you have created a button but it will not be able to be used, look at the code you wrote for your email address in your Personal Blog and your Professional Blog. Compare that code with the code you have generated in the spreadsheet. What is missing in your spreadsheet version? Correct your function in your spreadsheet to generate WORKING buttons for all the people on your list.