The devextreme-angular npm package format was changed

Since v19.2.5, devextreme-angular has the Angular Package Format to support IVY compiler in angular. If you use Systemjs, you need to change the configuration of devextreme in the config as follows:

JavaScript
System.config({  
    //...
    paths: {  
        'npm:': './node_modules/'  
    },  
    map: {  
        //...
        // devextreme & devextreme deps
        'jszip': 'npm:jszip/dist/jszip.min.js',  
        'quill': 'npm:quill/dist/quill.js',  
        'devextreme': 'npm:devextreme',  
        'devexpress-gantt': 'npm:devexpress-gantt',  
        'devexpress-diagram': 'npm:devexpress-diagram',  
        'devextreme-angular': './node_modules/devextreme-angular'  
    },  
    packages: {  
        // ...
        'devextreme': {  
            defaultExtension: 'js'  
        },
        // add packageConfigPaths
        packageConfigPaths: [  
            "./node_modules/*/package.json",  
            "./node_modules/@angular/*/package.json",  
            "./node_modules/rxjs/operators/package.json",  
            "./node_modules/devextreme-angular/*/package.json",  
            "./node_modules/devextreme-angular/ui/*/package.json"  
        ]  
});