Hi there,
when submitting a form (via Umbraco Forms) we’re receiving the following server error:
“Microsoft.AspNetCore.Antiforgery.AntiforgeryValidationException: The required antiforgery cookie is not present.”.
This behaviour occurs quite randomly, since this happens on multiple browsers. Even the UMB* system cookies are not being set, when this error occurs. But sometimes the form is being submitted without errors and with the needed cookies present.
We are currently on Umbraco Forms version 10.4.0 (Umbraco Cms version 10.5.1) but it happend also on version 9.5.2 (Umbraco Cms version 9.5.2).
The hidden field with the _RequestVerificationToken is rendered everytime.
We tried to render the form from a view component instead of the RTE but that doesn’t changed anything.
Does anybody have this issue too or an idea what we can try to fix it?
This is a companion discussion topic for the original entry at https://our.umbraco.com/forum/112310-umbraco-forms-antiforgery-cookie-not-present