potterandweb,
Thanks for getting in touch and sorry to hear you’re having trouble here, but hopefully I can help. Unfortunately, without doing a full review of the code in your custom theme, it would be pretty difficult for me to pinpoint the exact issue.
The Week View relies heavily on Javascript in order to display correctly, so I would try removing any custom javascript in your theme (or deactivating third party plugins) to see if there’s a conflict somewhere. You can also take a look at our troubleshooting guide on testing for conflicts, which might uncover the root cause.
Hopefully that gets you pointed in the right direction, but let me know if you have further questions. Thanks! 🙂
-Casey-