If you have been running into error while using commands in your sandbox, then you would have used the destroy button a couple of times.
This repository contains code that would fix you sandbox and restore it to how it should be if you didn't destroy it.
enter your sandbox and do
git clone https://github.com/mcsavvy/sandboxenter the location where you cloned this repository to and do
cd sandbox
git pull origin mainenter the location where you cloned this repository to and do
cd sandbox
bash ./main.sh