Welcome to the Forum @Sonnia_Hove and thank you for reaching out!
Sorry for the trouble here. You should be able to delete the (No Section) Section from your Board List following the same steps explained in Unwanted section “(no section)” in list view. Please note that at the moment, you need to make sure this Section doesn’t contain any task before you can delete it (make sure to set your view to “All tasks” to confirm this section doesn’t contain any complete task)
Our team is about to launch a new update allowing you to delete Sections whether or not they contain some tasks. Keep an eye on #community-forum-announcements:product-updates to be sure not to miss the announcement!
I hope this helps! Please let me know if you have any follow-up question!