Cannot save changes to a form

First off, my form works perfectly and has for a while. Recently I decided to increase the allowed file size of uploaded files from 1MB to 3MB. When I make the change and press Save, I am kicked to the home page of the site and the changes are not reflected in the form when I go back to it.

The website is savepauldingco.com but you will not see the issue on there because the problem involves editing and saving.

Grateful for any insight anyone can provide.

Here is the code.

<p><strong>First Name: (required)</strong><br />
[text* First]</p>

<p><strong>Last Name: (required)</strong><br />
[text* Last]</p>

<p><strong>Address 1:</strong><br />
[text Address1]</p>

<p><strong>Address 2:</strong><br />
[text Address2]</p>

<p><strong>City:</strong><br />
[text City]</p>

<p><strong>State:</strong><br />
[text State 2/2 "GA"]</p>

<p><strong>Zip Code:</strong><br />
[text ZipCode 10/10]</p>

<p><strong>Phone Number:</strong><br />
[tel PhoneNumber] </p>

<p><strong>Your Email: (required)</strong><br />
    [email* your-email] </p>

<p><strong>Subject: (required)</strong><br />
    [text* your-subject] </p>

<p><strong>Date YYYY-MM-DD: (required)</strong><br />
[date* DateOfIncident]</p>

<p><strong>Time: (required)</strong><br />
[number* Hour min:1 max:12 "12"] :  [number* Minutes min:0 max:59 "0"] [select* am-pm "am" "pm"] <br />

<p><strong>Airport: (required)</strong><br />
[select* Airport "Paulding Northwest Atlanta Airport"] </p>

<p> <strong>Primary Type of Complaint: (required)</strong><br />
[select* PrimaryTypeOfComplaint include_blank "Too Loud & Low" "Too Loud" "Too Low" "Too Frequent" "Hovering" "Excessive Vibration" "Too Early or Late" "Change of Flight Pattern" "Military" "Other (Provide Details in Message)"]</p>

<p><strong>Type of Aircraft: (required)</strong><br />
[select* TypeOfAircraft include_blank "Jet" "Turbo Prop" "Helicopter" "Propeller" "Unknown"] </p>

<p><strong>Type of Operation: (required)</strong><br />
[select* TypeOfoperation include_blank "Arrival" "Departure" "Overflight" "Other (provide details in Your Message)"] </p>

<p><strong>Officials previously contacted regarding this issue: </strong><br />
[checkbox contacted "Airport Manager" "Board of Commissioners"]
</p>

<p> <strong>Suggestions for information to include in your comments if available & relevant:</strong>
   ·  When did you notice the noise & what made you notice it?
   ·  Is the noise you notice recurrent or only occasional?
   ·  Is there a particular day of the week you experience the noise?
   ·  Is it a low flying aircraft? If so, capture & include tail # if possible.<br />

<p><strong>Your Comments:</strong><br />
    [textarea your-message] </p>

<p><strong>Upload File: </strong>[file file-693 limit:1mb]<br /><strong> Maximum file size: </strong>1MB <br /><strong>Allowed file Types: </strong>(jpg, jpeg, png, gif, pdf, doc, docx, ppt, pptx, odt, avi, ogg, m4a, mov, mp3, mp4, mpg, wav, and wmv)</p><br />

<p><strong>Validation Code:</strong><br />
[captchac captcha-777 size:l]</p>
<p><strong>Enter Validation Code Below</strong><br />
[captchar captcha-777]</p>

<p>[submit "Send"]</p>

https://wordpress.org/plugins/contact-form-7/