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I sometime got a 401 error while loading a form on my website

Question asked by Jean-Frédéric Beaudet on Jan 17, 2018
Latest reply on Jan 17, 2018 by Steven Vanderberg


Like the title said some user have reported a 401 error while trying to accessing a form on our website. The problems seems to occur when the user has already filled the form and has a mkto cookie on his machine.

I was able to recreate the problem on my machine and was able to fix it by clearing my cookies but I cannot ask my customer to do that.

I ask our dev team to look into it and they came back blaming Marketo for the error.

Here's the link to the form:…


What can cause this and what can be done to fix that?