NOTE: In addition to the cases below, a new possible source of this error is the use of Apple's iCloud Private Relay feature, available on newer iPhone, iPad, and Mac devices. This feature is not compatible with the university's Web Login Service at this time, so you must disable that feature while using services that require a login.
You may be seeing this page because you waited an extended period of time to submit the login form. After a set period, the server abandons your original request to save resources, and you'll need to return where you started from and try and login again.
You may also be seeing this page because you used the Back button while browsing a secure web site or application, causing the original web request for login to be "replayed". Alternatively, you may have mistakenly bookmarked the web login form instead of the actual web site you wanted to bookmark, or used a link created by somebody else who made the same mistake.
Left alone, this can cause errors on some browsers (such as Safari) or result in you returning to the web site you tried to leave, so this page is presented instead so that you can continue safely with your online activities. Note that you may need to hit the Back button multiple times to skip over all of the login-related pages in your history list.
If the problem is a bookmark, you'll probably notice that the bookmarked location contains a long URL that starts with https://webauth.service.ohio-state.edu.... If so, you should delete and recreate (or edit) the bookmark to contain the web address of the site you want to access. For example, to bookmark the Carmen web site, you would create a bookmark for https://carmen.osu.edu
If you're unable to avoid seeing this message, please contact the maintainer of the web site containing the link you're starting from so that they can investigate the problem. Be sure to provide the surrounding context and explain what you're trying to access so that they can find and correct the offending link.
Remember to clear your browser history to avoid improper access to whatever web sites you've been using if this is a shared machine, and never leave your own machine unlocked and unattended.