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Erros 401

Jonatas Margarida

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Jonatas Margarida


Whenever i open a document, i receive a message informing that a error as occurred - error 401.

However when i click on the button "ok" the file open normaly, i think.

What can i do to solve this error?

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Reymund Oyong

Greetings @Jonatas Margarida

Thank you for reaching out to us through our Community Forums.

I understand that you are getting a 401 error when opening Nitro Pro. 
Please try the steps below and see if it removes the error message:

1. Open your Nitro PDF Pro then close the 401 error message if it shows up. 
2. At the top right, click the Logout then close Nitro Pro.
3. Open Nitro PDF Pro then click the Login button and login using your Nitro Sign account. 

If the 401 error message happens again, please provide the exact version and build of your Nitro Pro. This information can be located under the Help tab > About Nitro Pro. 

Kind regards,

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