I'm getting this error on ng serve:
ERROR in node_modules/ng2-image-viewer/index.d.ts:3:22 - error NG6003: Appears in the NgModule.exports of SharedModule, but could not be resolved to a NgModule, Component, Directive, or Pipe class.
This likely means that the library (ng2-image-viewer) which declares ImageViewerModule has not been processed correctly by ngcc, or is not compatible with Angular Ivy. Check if a newer version of the library is available, and update if so. Also, consider checking with the library's authors to see if the library is expected to be compatible with Ivy.