Unexpected Application Error!

Loading CSS chunk 966 failed. (error: https://app.postplanner.com/static/css/966.b522da25.chunk.css)

ChunkLoadError: Loading CSS chunk 966 failed.
(error: https://app.postplanner.com/static/css/966.b522da25.chunk.css)
    at n.onerror.n.onload (https://app.postplanner.com/app.8db303913beef5733efa.bundle.js:1:1395458)