Executing build script is not working and getting syntax error

Trying to following the instructions in this link.
https://github.com/Infosys/openIDP/wiki/Installation

First step, executing build script:

```
 sudo su
root@ubuntu-jammy:/vagrant/openIDP# ./build.sh
Evaluating Hardware
Clearing Memory for Setup ...
./build.sh: 150: Syntax error: "do" unexpected (expecting "fi")
```