Error before make build when executing test.sh file

I am trying to install workbench on digitall ocean by following these instructions: https://github.com/rubykube/workbench/wiki/DigitalOcean-Installation. After Set $new_domain variable equal to your domain and run bash script, I run the test.sh file and it gives me the following error:

workbench@workbench-vm:~/workbench$ ./test.sh

sed: can’t read config/peatio.env: No such file or directory

sed: can’t read config/barong.env: No such file or directory

sed: can’t read config/toolbox.yaml: No such file or directory

Some Idea?
Ty