Ionic serve not working anymore

I was able to successfully able to run the app in my browser using ionic serve -c, but i get the following error:

 ERROR in node_modules/@ionic/pro/dist/src/definitions.d.ts(1,23): error TS2688: Cannot find type definition file for 'cordova-plugin-ionic'.
[ng] node_modules/@ionic/pro/dist/src/definitions.d.ts(33,13): error TS2304: Cannot find name 'IDeployPluginAPI'.
[ng] node_modules/@ionic/pro/dist/src/definitions.d.ts(36,33): error TS2339: Property 'IonicCordova' does not exist on type 'Window'.
[ng] node_modules/@ionic/pro/dist/src/index.d.ts(1,23): error TS2688: Cannot find type definition file for 'cordova-plugin-ionic'.
[ng] node_modules/@ionic/pro/dist/src/index.d.ts(34,22): error TS2304: Cannot find name 'IDeployPluginAPI'.
[ng] node_modules/@ionic/pro/dist/src/index.d.ts(41,29): error TS2304: Cannot find name 'IDeployPluginAPI'.
[ng] node_modules/@ionic/pro/dist/src/index.d.ts(54,33): error TS2339: Property 'IonicCordova' does not exist on type 'Window'.
[ng] node_modules/ionic-angular/umd/components/input/input.d.ts(3,10): error TS2305: Module '"C:/Users/Mike/apps/smokd/node_modules/rxjs/Subject"' has no exported member 'Subject'.
[ng] node_modules/ionic-angular/umd/components/tabs/tabs.d.ts(2,10): error TS2305: Module '"C:/Users/Mike/apps/smokd/node_modules/rxjs/Subject"' has no exported member 'Subject'.
[ng] node_modules/rxjs/Subject.d.ts(1,15): error TS2307: Cannot find module 'rxjs-compat/Subject'.
[ng]
[ng] i 「wdm」: Failed to compile.

This started after I ran npm install

Does anyone have any ideas?