504 error (clicking "Refresh your data" doesn't work)

Does anyone know how to resolve this? I click “Refresh your data” but this doesn’t solve it.

Try to reduce the request to a small number per_page (e.g. 5). It may be timing out due to many factors. If the data is large, the query to the database is poorly written, the db or api server(s) your hitting have insufficient resources, you may run into timeouts.