Try here @renefritze . And then when your session starts and says 404 : Not Found You are requesting a page that does not exist!, change the end of the URL from /lab to /tree and then hit enter in your address bar. That should take you to the classic Jupyter notebook dashboard.
You have an overly complex requirements.txt for ease in use with MyBinder. I recall from dealing with other’s repos where they just dump the entire freeze list, that it can conflict with proper JupyterLab installation as the MyBinder underlying settings get updated. You apparently have such a conflict and so that is why when it launches and tries to go by default to the link ending in /lab, it fails. (Actually here it was nbinteract, which you don’t have. And so I’d need to play around with eliminating different ones to actually tell which one or ones in your case. I don’t wish to do this now.)
If there is a specific reason for documenting all the versions in a file named requirements.txt, then you should use a sub-directory called binder and place a separate requirements.txt there. (MyBinder will preferentially use configuration files in a subdirectory called binder or .binder.) In the requirements.txt list there in the binder directory, only list the few special packages that MyBinder doesn’t come with by default that your code needs to run without error. And don’t pin any of those, unless you find you must. For example, it looks like you have scipy listed and that would be one to include in the streamlined requirements.txt. Most of your current list, you wouldn’t want there, such underlying things like terminado,nbconvert, nbformat, and tornado that MyBinder handles for you.
Not pinning and only listing the special packages you need in the requirements.txt, will help keep your repo cooperating with the MyBinder machinery longer and because you usually get the current versions of packages developed in step with other packages you use, it actually ends up making your code work longer.
Alternatively, I’ve seen others suggest you rename your current requirements.txt to something like requirements-dev. And then make the new one MyBInder will use as requirements.txt in the root.