I have an Error in javascript When start quiz in Coursera

enter image description here“Problem starting this assessment
This is typically due to an unusually high volume of concurrent starts. If that’s the case, our systems are rapidly adjusting to accommodate the increased load.

Please try again after a few minutes. Your patience is greatly appreciated.

If this is an exam with a time limit: Rest assured that the timer will only start counting down once you’ve successfully started the exam.

Should the issue persist, please reach out to our support team.”

I cleared cookies and unenrolled and wait long time and talke to support
I didn’t have any solutoion