John O'Connell Posted June 1, 2022 Report Share Posted June 1, 2022 I've installed Nitro PDF Pro 126.96.36.199 but cannot activate it due to an error saying "Unknown error" (very helpful) When I try activating manually using a web browser to get an activation certificate, a browser is opened and navigates to www.internetactivation.com from which I get a "Http/1.1 Service Unavailable" error I'm guessing the only option is to upgrade but I don't see anywhere on the site where I can get upgrade pricing. Link to comment Share on other sites More sharing options...
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