Unsupported version on Ubuntu 20.04

OS: Ubuntu 20.04
sum@zbox:~$ wget -O - https://github.com/OpenMediaVault-Plugin-Developers/installScript/raw/master/install | sudo bash
--2020-05-22 22:10:52--  https://github.com/OpenMediaVault-Plugin-Developers/installScript/raw/master/install
Resolving github.com (github.com)... [sudo] password for sum: 140.82.118.3
Connecting to github.com (github.com)|140.82.118.3|:443... connected.
HTTP request sent, awaiting response... 302 Found
Location: https://raw.githubusercontent.com/OpenMediaVault-Plugin-Developers/installScript/master/install [following]
--2020-05-22 22:10:54--  https://raw.githubusercontent.com/OpenMediaVault-Plugin-Developers/installScript/master/install
Resolving raw.githubusercontent.com (raw.githubusercontent.com)... 151.101.192.133, 151.101.128.133, 151.101.64.133, ...
Connecting to raw.githubusercontent.com (raw.githubusercontent.com)|151.101.192.133|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 14374 (14K) [text/plain]
Saving to: 'STDOUT’

-                   100%[===================>]  14.04K  --.-KB/s    in 0.01s   

2020-05-22 22:10:54 (1.14 MB/s) - written to stdout [14374/14374]

Sorry, try again.
[sudo] password for sum: 
Current / permissions = 755
New / permissions = 755
Updating repos before installing...
Hit:1 http://au.archive.ubuntu.com/ubuntu focal InRelease
Hit:2 http://au.archive.ubuntu.com/ubuntu focal-updates InRelease
Hit:3 http://au.archive.ubuntu.com/ubuntu focal-backports InRelease         
Get:4 http://security.ubuntu.com/ubuntu focal-security InRelease [107 kB]   
Fetched 107 kB in 2s (49.9 kB/s)   
Reading package lists... Done
Installing lsb_release...
Reading package lists... Done
Building dependency tree       
Reading state information... Done
0 to upgrade, 0 to newly install, 1 to reinstall, 0 to remove and 12 not to upgrade.
Need to get 10.6 kB of archives.
After this operation, 0 B of additional disk space will be used.
Get:1 http://au.archive.ubuntu.com/ubuntu focal/main amd64 lsb-release all 11.1.0ubuntu2 [10.6 kB]
Fetched 10.6 kB in 0s (68.9 kB/s)       
(Reading database ... 231748 files and directories currently installed.)
Preparing to unpack .../lsb-release_11.1.0ubuntu2_all.deb ...
Unpacking lsb-release (11.1.0ubuntu2) over (11.1.0ubuntu2) ...
Setting up lsb-release (11.1.0ubuntu2) ...
Processing triggers for man-db (2.9.1-1) ...
Unsupported version.  Exiting...
OpenMediaVault-Plugin-Developers / installScript

Unsupported version on Ubuntu 20.04 #20
