Https://forums.autodesk.com/t5/acc-general-discussion-forum/how-to-resolve-copyright-error-code-31600-quickly-amp-easily/td-p/13657338 https://forums.autodesk.com/t5/acc-general-discussion-forum/how-to-resolve-copyright-error-code-31600-quickly-amp-easily/td-p/13657338