In my case, it was duplicate , in the Routes array in app.routing.ts.
You can use ,[\s]*, as a Regular Expression search query to find it in your routes to find two commas with (0 to many) white spaces in between them.
In my case, it was duplicate , in the Routes array in app.routing.ts.
You can use ,[\s]*, as a Regular Expression search query to find it in your routes to find two commas with (0 to many) white spaces in between them.