Submit Button Grayed Out for the User

Hello Experts,

Could you please help me with the issues below?

1. A user reported that the Submit button is grayed out even though all the mandatory fields have been filled. This is currently preventing them from submitting the enquiry.

2. For one of the users, an error message appears saying “Thank you for submitting” when they try to submit the form with all the required details.

I would really appreciate it if anyone could help with a quick solution, as this issue is blocking users from submitting their enquiries.

Thank you!