The issue with the Validation Rules Challenge on Trailhead

I have created validation rules as part of a Trailhead challenge. After following all the instructions and completing the challenge, I encountered an error when verifying my step. The error message stated:

“An unexpected error occurred while inserting Opportunity records and we couldn’t check your work. Make sure Opportunity records can be inserted in this org, and click ‘Check Challenge’ again. If this continues, contact the Trailhead Help team.”

I have double-checked my work, and everything seems correct. How can I resolve this issue and successfully complete the challenge?

#Trailhead Challenges