Blank pages when clicking on "Dashboard" links as admin

When clicking on: "needs reviewer approval" https://beta.plus.europepmc.org/search?status=in-review "needs final review" https://beta.plus.europepmc.org/search?status=xml-review and "tagging" https://beta.plus.europepmc.org/search?status=tagging from admin dashboard (https://beta.plus.europepmc.org/admin-dashboard) I am greeted with a blank page when I refresh the page I get a flash of header but then back to blank!