503 Error pages:
If you're seeing 503 errors on the studies page, this is because you're requesting this page too frequently.
If you're using a page monitor, please turn this off temporarily to see if this solves your issue. It should only take ~1min to reset your request limit.
You can use page monitors, but please limit the requests to less than 1/min.
If you're using Prolific Assistant please note that the default time is in seconds so you'll need to set the check time to > 60.