So I am responsible for taking an Angular application from 8.2.2 to current and I was able to get it to build, but when I run ng Serve and connect to the site I get this error: After researching this for quite a while, I made sure all my services had @Injectable() added. I know that this is typically a NodeInjector issue, but the error is different than what I have seen online (NG0201 can't find provider for ...). I have checked some of the other items, but I can't figure out exactly where this error is in the code. Any ideas on what this issue actually could be? This is a large app, so I can post code as requested. Continue reading...