does anyone know how to fix this?

[ctoswar]

./install.sh: line 11: /home/pi/Dexter/lib/Dexter/script_tools/functions_library.sh: No such file or directory
Special thanks to Joe Sanford at Tufts University. This script was derived from his work. Thank you Joe!
Pi4 already configured
./install.sh: line 48: feedback: command not found
I2C-dev already present
i2c-bcm2708 already present
spi-dev already present
./install.sh: line 68: feedback: command not found
i2c1 already present
i2c_arm already present
adduser: The user ctos' is already a member of i2c'.
./install.sh: line 86: feedback: command not found
./install.sh: line 87: /home/pi/Dexter/lib/Dexter/script_tools/install_avrdude.sh: No such file or directory
./install.sh: line 88: create_avrdude_folder: command not found
./install.sh: line 89: install_avrdude: command not found
done with AVRDUDE for the GrovePi