Reached the limit for logged-out tests this month on WPT Private Instance

Hi,

I have updated my Webpagetest Private Instance last week to the latest release and I noticed that upon testing using the UI or the frontend, I am always prompted with an error that I have reached the limit for logged-out tests this month and needs to login (see screenshot below):

However, using the API with multiple testing (20 automated tests) shows no error at all.

I am using both Ubuntu 18.04 in both wptserver and wptagent.
Your help is much appreciated to resolve the issue when running the test on the UI.

Thank you