As the subject says, if I go to my profile at https://pagure.io/user/nphilipp, the activity heat map displays as an empty box. Looking into the browser console, I get these errors/warnings:

• 3.v3.min.js:1 Failed to load resource: the server responded with a status of 404 (Not Found)
• cal-heatmap.min.js?version=5.10.0:8 Uncaught ReferenceError: d3 is not defined
  at cal-heatmap.min.js?version=5.10.0:8
• cal-heatmap.min.js?version=5.10.0:8 Uncaught ReferenceError: d3 is not defined
  at new CalHeatMap (cal-heatmap.min.js?version=5.10.0:8)
  at nphilipp:288
• DevTools failed to load SourceMap: Could not load content for https://pagure.io/static/vendor/cal-heatmap/cal-heatmap.source-map.js: HTTP error: status code 404, net::ERR_HTTP_RESPONSE_CODE_FAILURE
• DevTools failed to load SourceMap: Could not load content for https://pagure.io/static/vendor/bootstrap/bootstrap.bundle.min.js.map: HTTP error: status code 404, net::ERR_HTTP_RESPONSE_CODE_FAILURE