System.InvalidOperationException Operation is not valid due to the current state of the object.

The following error message is received when saving an (new style) Event Registration Form.  The error is not received when working with the Classic Event Registration form.

System.InvalidOperationException    Operation is not valid due to the current state of the object.    at System.Web.HttpValueCollection.FillFromEncodedBytes(Byte[] bytes, Encoding encoding) at System.Web.HttpRequest.FillInFormCollection()
 This is resolved in the latest version of NetCommunity. If this behavior is persistent, please confirm you’re on the latest version of NetCommunity.

Environment

 6.53.516, patch 5
 6.55

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