bad math expression: illegal character: "

I am sorry but I am getting this error when executing
sudo -s source ./installSpotbit.sh

./installSpotbit.sh:58: bad math expression: illegal character: "

-------Spotbit - Checking if logged in as root.

./installSpotbit.sh:88: = not found

Can you help me with this?

What output do you get when you try [ "a" == "b" ] && echo 1 || echo 0

Then try:
sudo -s bash -x ./installSpotbit.sh

Please share the last 5 lines of output at the error if you can't share the whole output trace.