Why are the Form tasks not accessible in my database?

I have created a new Database in Base and also a couple of tables in it. However when I try to create a form to fill in data, all the Form tasks are grayed out and cannot be clicked on. Am I doing something wrong?

Can you edit your data directly in the Table view mode (Tables > double click on your table to open it) ?

If you can not enter data via the direct Table entry mode, then that would indicate that you haven’t set up a primary key for each of your tables.