How to put text in my blog page?

Hello, I have had no feedback on this issue. I waant to be able to write text on my blog page and publish it. https://kay-conseil.fr/blog-marketing-et-digital/ <span class="Y2IQFc" lang="en">This page does not currently allow it. How to do please? </span> <span class="Y2IQFc" lang="en">Thanks for your help,</span> Laure