Angular bugfix. Help with university project

I am working on a student attendance + grading system I have to do for university. I am currently working on frontend part and I am having problems in Angular (I am using 6.1.3). I am working with git (so you can see when the app was working and when not) and when I revert the changes two commits ago, the bug disappears. If you will help me with this, I will share the repository and I will explain through a skype session what I faced. I deployed a version of the project that shows exactly the problem I am facing. [login to view URL] - here if you enter the console in web dev tools, you will see a message "ERROR [OBJECT]". This is the problem I couldn't troubleshoot. You can go with the debugger through the code on my webpage. I don't know if this platform has this feature, but if you are not a robot, please add a message with string "not robot" or smth Cheers