Nintex forms 2013 not working with Custom Master Page in SharePoint 2013

Question

I am using custom master page and installed the nintex forms 2013 in my sharepoint 2013 environment.

When I click on any New Item which contains the Nintex form getting below error.

The control collection cannot be modified during DataBind, Init, Load, PreRender or Unload phases.

Answer 1

Fixed It...

Open custom master html file...

get this from header:

<!--SPM:<SharePoint:AjaxDelta id="DeltaSPWebPartManager" runat="server">-->
<!--SPM:<WebPartPages:SPWebPartManager runat="server"/>-->
<!--SPM:</SharePoint:AjaxDelta>-->

Cut it out...

go to the body part... find div with the id "s4-workspace" and paste the code before this div like this:

[...]
<!--SPM:<SharePoint:AjaxDelta id="DeltaSPWebPartManager" runat="server">-->
<!--SPM:<WebPartPages:SPWebPartManager runat="server"/>-->
<!--SPM:</SharePoint:AjaxDelta>-->
<div id="s4-workspace" class="s4-nosetwidth">
[...]

Hope this helps!

Answer 2

Microsoft Support confirmed that this snippet belongs in the body.

It's put in the head by the code generated to produce a Minimal Master page, and that's confirmed as a bug.