What does this mean, "over your rate limit, upgrade account"?

My Meta mask is intermittently deleting the translation of all USD values over the last few days. I keep it on both a cell phone and also a chrome extension. In settings, I have made sure currency conversion is set to USD. I have tried setting it and unsetting it and setting it again. That does not work. Now I am getting a red message saying I am over my “rate limit, please upgrade”.

What does this mean and how can I fix it?

Thank you.