I am a teacher and my students' collaborative links are not working. When we click on them an error message comes up - link expired. I can't even find their designs under their names in my class. I have tried the following tips suggested in other posts:
-adding "v2" next to the "edit" part of the link
-making sure there is an = sign at the end of the link
-logged into Google before clicking on the link
Are there any other resolutions for this other than starting over?