How many dynamic sections do you currently have active? I had this problem last year and the current limit is set to 5. After 5 active dynamic sections, they grey out and you are restricted from adding anymore.

I did inquire why that is the limit and was told “that’s just the limit”.

I have more than 5. Thank you for this answer. I will follow up with them

To work around the dynamic sections limitation, you must work with kits and add items in kits, to which you can add more dynamic fields. 

You’ll have to re-think your form a bit.