Can't Run install.sh

I got my ArduBerry quite a few years ago, but have just got around to playing with it. I have a Raspberry Pi with the Raspbian Buster. I have cloned the github from the getting started and made install.sh an executable program,

sudo chmod -x install.sh

I have tried to run it twice, and this pops up:

user@raspberrypi:~/ArduBerry/Script $ ./install.sh
-bash: ./install.sh: Permission denied
user@raspberrypi:~/ArduBerry/Script $ sudo ./install.sh
sudo: ./install.sh: command not found

What can I do? Is the software not made for Buster? Has the project been terminated and no more updates are coming?