TypeError: Expected a string but received a undefined
TypeError: Expected a string but received a undefined at assertString (D:\Projects\blog-website2\node_modules\validator\lib\util\assertString.js:17:11) at Object.isEmpty (D:\Projects\blog-website2\node_modules\validator\lib\isEmpty.js:19:29) at field_validation_function (D:\Projects\blog-website2\src\middlewares\admin\login_form_validation.js:9:22) at module.exports.field_validation (D:\Projects\blog-website2\src\middlewares\admin\login_form_validation.js:27:8) at Layer.handle [as handle_request] (D:\Projects\blog-website2\node_modules\express\lib\router\layer.js:95:5) at next (D:\Projects\blog-website2\node_modules\express\lib\router\route.js:137:13) at Route.dispatch (D:\Projects\blog-website2\node_modules\express\lib\router\route.js:112:3) at Layer.handle [as handle_request] (D:\Projects\blog-website2\node_modules\express\lib\router\layer.js:95:5) at D:\Projects\blog-website2\node_modules\express\lib\router\index.js:281:22 at Function.process_params (D:\Projects\blog-website2\node_modules\express\lib\router\index.js:335:12)