I am sorry for any inconvenience!
Would you mind responding with a full screen shot of the error? Be sure to use the 'Insert Image' option to attach the screen shot in your reply.
Have a good evening!
Thank you, Dennis!
I was able to proxy into your account with a private browsing window.
This is the link where I logged in: www.wileyplus.com/class/714035
You might try clearing your cache and cookies, and see if that helps.
How to clear cache and cookies: https://kb.wisc.edu/helpdesk/page.php?id=12384
How to use a private browser: How to Enable Private Browsing on Any Web Browser
Please let me know if the issue persists, or if you have any questions. Have a great day!