people having trouble opening forms

page gives a warning not secure

https://www.jotform.us/form/50211496887159

I did not have any problem opening your form:

You might want to embed your form using the Iframe method to avoid any conflict in your page: http://www.jotform.com/help/148-Getting-the-Form-iFrame-Code

Before you embed the code, paste it in a text editor like WordPad, you will notice two part of codes, only copy and embed the IFrame part in your webpage, example:

Let us know if you need more help, we will be glad to assist you.