If these conditions are generally being met, the reason for a standalone file not running is almost always an outdated graphics card driver. In this case, please make sure to update the graphics card driver for the machine you want to run the Enscape Standalone file on. This will drastically increase the chances of Enscape being able to run, albeit the system seems to not have a supported GPU installed I’m afraid.
For lower-spec machines, Macs, and mobile phones we recommend to use our panorama rendering feature, which should be a valid substitute. Please have a look at this knowledgebase entry for more info.