Kate Douglass Posted October 7, 2020 Report Share Posted October 7, 2020 Hi. I just paid for Nitro pro. I've already gone to the activation portal and it says the serial number I am entering is correct. Still when I paste it into Nitro Pro to activate it gives the error message in the title above. The last digits in the serial are 88778. Can you please help? Thank you. Link to comment Share on other sites More sharing options...
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