Submit button not visible to clients

When I preview and test the forms, I see the submit button. However, my clients are stating that they are not seeing the submit button and unable to submit the form.

You are referring to this form: https://www.jotform.com/203356305656152. If yes, the Submit button is visible at the bottom of the form:

Are your users accessing this direct form link or have you embedded this form on any website from where your users are accessing the form? If yes, please provide us the web page URL to check.