Hello @DeletedUser
It mainly depends on which quiz you are using - classic or new. The function and setup of them can be pretty different - what is glitching out on you exactly?
Here is the Canvas guide:
https://community.canvaslms.com/t5/Instructor-Guide/How-do-I-create-a-quiz-with-individual-questions/ta-p/1248
https://community.canvaslms.com/t5/Instructor-Guide/How-do-I-create-a-quiz-using-New-Quizzes/ta-p/1173
If it indeed is a "glitch" It is likely your internet browser and we recommend clearing the cache and cookies or trying another browser.
In Chrome
On your computer, open Chrome.
At the top right, click the three dots
Click settings
On the left, choose Privacy and Security
Then, clear browsing data
At the top, choose a time range. To delete everything, select All time. I suggest at least 4 weeks
Next to "Cookies and other site data" and "Cached images and files," check the boxes.
Click Clear data.