1. Which version of APT are you using? I would recommend beta 11 because that version has the ability to force the rendering of images, via a combo box to choose picture export option (Always/Never/Auto), rather than the so-called 'smart' if-required rendering of beta 10:http://www.autopano.net/wiki-en/Lastest_Beta#Autopano_Tour_1.1.0_beta_11
2. When you get the error are you viewing the tour locally - from your PC rather than from your Web server? This message:
"WARNING: not local trusted - ExternalInterface disabled!"
looks like it could be a Flash security message and you may need to configure the Flash Player appropriately:http://krpano.com/docu/localaccess/
3. To ensure all your output files are in 'one place' to facilitate uploading to your server I recommend creating a new ouput folder for each new tour.
4. To ensure you don't risk losing source files use the Extended-save-as command to copy all source files to a single location.