Are you getting this error on Sitecore 9 Forms Submission? I got it and it took me some time to figure out. It’s all related to Validation. Here are the points to check to narrow down the issue —
- If you have form fields set it to mandatory, change it to optional and see if that makes the submission successful. If so, one of the field validation is causing trouble.
- It happens for custom form control quite often, where you need add the validation to razor view file and make sure you have this attribute – GenerateUnobtrusiveValidationAttributes.
<label for="@Html.IdFor(m => Model.Value)" class="@Model.LabelCssClass">@Html.DisplayTextFor(t => Model.Title)</label> <select data-trigger class="@Model.CssClass @Model.Name" name="@Html.NameFor(m => Model.Value)" id="@Html.IdFor(m => Model.Value)" data-sc-tracking="@Model.IsTrackingEnabled" data-sc-field-name="@Model.Name" @Html.GenerateUnobtrusiveValidationAttributes(m => m.Value)> </select> @Html.ValidationMessageFor(m => Model.Value)
- Compare your custom control razor file to any one of inbuilt form controls ([iis-site-folder]\Views\FormBuilder\FieldTemplates ) like below and if you see any difference on attributes, add it out.
- Finally a simple check: make sure to publish all the forms and view the landing page in live mode(not in preview mode)
Hope this helps. Happy sitecoring.