I found the same problem - I had used Editey which was a Google Drive add-on that stopped working right about the time students were to be working on their final projects. I found this video after some search and tried it out - and it works! I know it’s a lot of setup to get the students so I’m going to make a form that they will submit that shared folder through it, then create my own link to grade their work. Hope that helps!
I’ve also switched over to Thimble by Mozilla - it’s been great for students. I’ve also personally used CodePen which is very similar. I’ve tried both because my district has strange filters that block CodePen when you are publishing.
This is my first year teaching comp sci at my school. Up until now I taught math and special ed. I taught summer camps prior to this. We just started the web design unit this week so I’ll let you know how it turns out.
Just wanted to loop back - if your district/school has the money, might want to invest in a Pro account with CodePen - it has some VERY cool features which you can share your code directly to students and they can modify on the fly. Just got a chance to see it this weekend.