Welcome to the forum...
Can we have the URL for the tour that's generating the error message?
To ensure you have uploaded all the file required for tour, use the Build as...option and build the tour into a new folder then upload all the contents of that folder to your Web server maintaining the file and folder stutcure.
For the relevant version of a tour to be loaded on the viewing platform you must access the tour via the HTML file created when you build the tour, or customised version of it that retains its functionality.
The HTML file invokes a script that detects the browser user-agent and if the browser user-agent is asociated with an iDevice it loads the HTML5 version of the tour, in all other cases it attempts to load the Flash version of the tour.
The HTML5 versions of tours created with PTP 1.8 x are designed solely for iDevices.
The most recent version of krpano (1.16) offers more extensive support for HTML5 on wider range of platforms.http://krpano.com/forum/wbb/index.php?page=Thread&postID=45020#post45020
PTP 2.x which Kolor will demonstate publicly for the first time in June at the IVRPA meeting in Iceland will incorporate the latest version of krpano.http://www.kolor.com/blog-en/2013/04/11/kolor-panotour-pro-2-0-prepare-for-the-next-generation-virtual-tours/