Error: Server error, try reducing the number of threads. WPSCAN

[ivolangen]

Hi, i have a problem while brute forcing a website. I am brute forcing a wordpress website and using Linux If a start brute forcing the website i got a lot of errors "Error: Server error, try reducing the number of threads. " I tried a lot of things and reduced the threads to 1 but it does not solve the problem. This is the code:

• sudo wpscan --password-attack xmlrpc --max-threads 1 -U ** -P /opt/useful/SecLists/Passwords/Leaked- Databases/rockyou.txt --url ***

Can somebody please help because it is a school project where the deadline is short from.