I found three different posts here about Sandbox not working.
I tried “repair” installation “Run as Administrator” as suggested
I have the “Sandbox Tools” extension enabled in Extension Manager
…but when I check on the “Sandbox tools” in the list under View->Toolbars->Sandbox Tools, nothing happens (no toolbar appears).
Try repairing the installation of SketchUp. Close all instances of SketchUp and LayOut. Find the downloaded installer file, right click on it and choose Run as administrator. If presented with the option, choose Repair. After it has finished, shut the computer down to do a cold reboot. Then check to see if you can get the Sandbox Tools toolbar to display.
Okay. I repeated the “run as administrator” repair fix, then shutdown my computer, waited a minute or so, then powered the CPU on. I don’t have any change in the situation.
Nothing different. Virtually all the toolbars in the list give an immediate visual change to checking/unchecking the box next to it (without exiting and re-opening the program). “Sandbox” does nothing.
Sandbox is an extension. If an extension earlier in the alphabet runs into trouble, Sandbox, and later alphabet extensions, may not load.
If you close SketchUp, then go into this folder (copy and paste this text into the path field of File Explorer):
%AppData%\SketchUp\SketchUp 2020\SketchUp
Temporarily rename Plugins to something else. Now open SketchUp and see if Sandbox is there. If it is, one of your other extensions may have problems. You could look in the renamed Plugins folder, think about what might be a problem, then close SketchUp, move some extensions back into the newly created Plugins folder, and open SketchUp again. Hopefully you will soon track down the plugin causing the problem.
It is not in the manager. And I’m assuming yes it was run as Admin. Our IT department has to enter credentials any time we install software on our laptops. I’ve tried to add the extension itself through the manager, but it gives me an error every time.
My recommendation is to start with a repair of the installation under your user login. If your IT department will grant you temporary admin rights to install software on your computer download the SketchUp installer, right click on it and choose Run as administrator. Then choose the Repair option if it is presented. Doing this should not affect any 3rd party extensions you may have installed, your workspace arrangement, or other preferences.
Prior to my retirement, my employer had a similar arrangement designed to prevent the average user from having admin rights but I could request temporary rights which allowed me to properly install applications like SketchUp as well as test software I needed for servicing anesthesia and respiratory equipment.