An Update:
I updated the database to 6.3.3 but made sure I saved my template. I then installed the new copy of WordPress and tested it on the default theme. It did show my first post, but after I reinstalled my website theme, it disappeared. The Tinymce error is gone now, but as I said, my posts are not showing up.
My first page is located here: https://tamara-braun.com/comments . Is there anything that could help me to figure this out?
TO
