Error when saving any edits to Grading Period Sets

This behavior has been resolved and deployed to the production environment as of 9/10/25.
Description
When Saving a grading period, a banner is seen at the top of the page that the grading period set was updated successfully, but the page is blank and at the bottom you'll see "Unexpected Application Error! Cannot read properties of undefined (reading 'focus')"
Expected Behavior
No page blank/error when saving grading periods.
Workaround
No workaround exists at this time.
Steps to Reproduce
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Go to Grading tab in account.
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Click the pencil for a grading period set.
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Make an edit, or don't, and click Save.
Additional Info
EVAL-5845
Known issues indicate notable behaviors that have been escalated to the Canvas engineering team. Known issues are not a guarantee for an immediate resolution. This document is for informational purposes only and does not replace the Support process. If you are encountering the behavior outlined in this document, please ensure you have submitted a Support case (per your institution's escalation process) so Canvas Support can adequately gauge the overall customer impact and prioritize appropriately.