Hi @satisfied_Cadenced3e2,
Sorry you're running into this, especially with your assessment due tomorrow.
Please first open Creative Cloud Desktop > Apps > Beta and check for an update to Illustrator (Beta). Beta builds are updated periodically, so an older installed build can expire. Ref:
https://helpx.adobe.com/x-productkb/global/creative-cloud-beta.html
If Creative Cloud shows the Beta as current but Illustrator still reports “build has expired,” uninstall only Illustrator (Beta) and reinstall the latest Beta from Apps > Beta.
If no Beta update appears, please update/restart the Creative Cloud desktop app and check again.
Let us know whether installing the latest Beta build resolves the issue.
Thanks,
Abhishek