Student Log In Problems

Hello…I am Admin for our school’s G Suite account and also part time teacher for computer. Several months ago, I added SketchUp for Schools to our account and began using it myself. Now, I want to finish out the year with 8th graders in SketchUp, but they can’t log in. I can access it along with another teacher, but no students…What can be wrong? Our domain is @countrysidechristian.net. I did delete the app and reinstall via domain install and gave permissions, also pop ups are enabled. edu.sketchup.com is whitelisted, also I took a cue from another entry on this forum and whitelisted file://proxy.html although I have no idea if that helped anything…Any help? …thanks!