I use the V1.1.0 beta 7 version and I alreaddy succeded in the past with it, by uploadind a tour on my website, that why I don't understand what occurs now...
When I save the tour , register the project in my website's fold, so that all the files are in the good location.
Of course,I also save the project in an other folder where are located my other tour projects, each one in a sub folder.
When I open the html file of the concerned tour in my website's file, it runs. Same when I open "in local" the html file uploaded on the server.
Can you post the URL to the tour that is generating the errors?
I don't really understand what you mean when you say "When I open the html file of the concerned tour in my website's file, it runs" ...but you also say "It 'just' doesn't work on line..."
APT V1.1 beta 7 is rather ancient now. The latest and last beta for Autopano Tour is beta 11.
But it would probably be best to switch to Panotour (or Panotour Pro if you have a krpano licence) I think becasue those versions will supercede/replace AutopanoTour very soon when the final release of APG V2.5 is ready.