Jacquiline Singh Posted June 29, 2022 Report Share Posted June 29, 2022 Can someone please help with Error 401 which does not allow my Nitro software to open up. I use Nitro Pro v9. Thanks Link to comment Share on other sites More sharing options...
Official Nitronaut Reymund G. Posted June 30, 2022 Official Nitronaut Report Share Posted June 30, 2022 Greetings @Jacquiline Singh Thank you for reaching out to us through our Community Forums! Please try the steps below and see if it will resolve the 401 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 PDF Pro. 3. Open it again then click the Login button and login using your Nitro Sign account. If this did not resolve the issue, please uninstall your current installation then install the latest build of Nitro PDF Pro 12 (12.16.9.574). Please note that we no longer support Nitro Pro 11 and older and its activation servers have been shut down. Also, access to the installer for older versions are no longer available. However, your license has been reset and was transferred to the new activation server, allowing it to activate the latest build of Nitro PDF Pro 12 which is 12.16.9.574. The Nitro PDF Pro 12.16.9.574 installer can be located from the following location: https://www.gonitro.com/product-details/downloads - click the 'Download Nitro Pro 12' link. After the installation of Nitro PDF Pro 12.16.9.574, activate it using your existing serial number. Once activated, perform again the steps above if you still encounter the 401 message. Kind regards, Link to comment Share on other sites More sharing options...
Jacquiline Singh Posted June 30, 2022 Author Report Share Posted June 30, 2022 Thanks for your help, but this did not work. Link to comment Share on other sites More sharing options...
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