Receiving errors while redirecting user after form submission

Hi everyone, 

I need to show an online form on every page of my site. After the user submits the form, I want to redirect them to another page URL. 

On the home page, I add a ContentArea property and add a form to the ContentArea. 

On the _Root page, I use the Html.DisplayFor to render the ContentArea property.

When I go to the home page, I can see my form created:

However, if I submit the form, I'm receiving the following error:

I'm using the default redirection setup from Episerver Form. The error disappears if I remove the redirection URL from the form settings.

Also, if I move the Html.DisplayFor from the _Root layout to the Home view, I don't receive any error after submitting the forms. However, I don't want to repeat it on every view but I want to add it to the Root layout.

Has anyone experienced the same issue and how did you fix it?

Thanks,

Thai