Installation fails to proceed if Volume Name contains no spaces.

[grahampugh]

The script doesn't work if the disk's name doesn't contain a space. E.g. it works on 'test
1' but not on 'test1'. The same also happens with the 'erase-install.sh' script from your
website.

It downloads the installer without any problems then there's shortly a screen displayed
with the info that the OS is being upgraded and then it goes back to the normal OS desktop
with the user still logged in.

If I run the script from the command line then I get the following error message:

Error: could not find target...  

and then:

[erase-install] 'jamfHelper' ended

I've tried this with different disk names and both with encrypted and unencrypted disks.
The computer is running the latest version of High Sierra with all updates applied, it's a
13" MacBook Pro from September 2015.
Do you have an idea what's going wrong?