Some of the tools in my Illustrator app are not working.

Hello @Fennell29823256mz6a,

We understand that encountering technical issues can be frustrating. I hope the suggestions shared by Ton helped resolve the problem. If not, kindly try resetting Illustrator's preferences by following the steps shared in this article (https://helpx.adobe.com/illustrator/kb/troubleshoot-preference-issues.html) and sharing your observations.
Disclaimer: Please note that resetting preferences will remove all custom settings, and Illustrator will launch with the defaults. You may save a backup of these settings from the location mentioned in the article.

Looking forward to hearing from you.

Thanks,
Anubhav

You are probably looking at the customization of a new custom toolbox.

What happens if you select Windows > Toolbars > Advanced?