fix some Errors and updated!

employeemanagement/.firebase/hosting.ZGlzdA.cache

employeemanagement/dist/asset-manifest.json

employeemanagement/dist/index.html

...ist/precache-manifest.2027cfa612ef75ade9907f823fb1cb04.js

employeemanagement/dist/service-worker.js

employeemanagement/dist/static/css/main.0d09a1ba.chunk.css

...yeemanagement/dist/static/css/main.0d09a1ba.chunk.css.map

...yeemanagement/dist/static/css/main.d47afa21.chunk.css.map

employeemanagement/dist/static/js/main.866f53d8.chunk.js

employeemanagement/dist/static/js/main.866f53d8.chunk.js.map

employeemanagement/src/components/layout/ManageShift.js