UPDATE: This issue has since been resolved. If you are still seeing this error in your internet browser, you may need to clear your browser cache. Instructions can be found here: https://wmich.edu/helpdesk/internetclearingcache
A recent Chrome update has caused an issue with some links in GoWMU, such as Add/Drop Classes, My Schedule, and more. If you see an error message when accessing these links, click the "Advanced" button in the bottom left, and then click the link to proceed to the page in the bottom left as well.
Our administrators are working closely with the vendor to resolve this problem, and expect to have the issue resolved soon. Questions can be directed to the Help Desk at (269) 387-4357.