Hi!
Hmm, to confirm, are you still able to both generate local HTML and publish to Axure Share without issues? This will help to confirm that it’s just preview that is affected on your machine and that you’re not running into a file-specific or more general issue.
If just preview isn’t working on your end and the disk isn’t case-sensitive, then could you let us know which error you’re getting in the browser? Does it occur in all browsers, and for all files (including new files, if you haven’t tested already)? Did preview ever work on this machine? If so, are you or your IT team aware of any changes that were made to the machine at around the same time as the preview issue started, such as any changes or new installations for security or antivirus tools? If there are any additional security tools installed or running in your network environment, then we’d recommend pinging IT to ensure that there isn’t anything preventing Axure RP from generating a preview on the localhost at 127.0.0.1.
If the preview issue is urgent, feel free to email support@axure.com so that we can assist you one on one. Thanks!