Private Xinfin Node Not Starting Up

I am trying to get a private XinFin node up and running, by following this guide.

Steps to reproduce:

• Follow the guide in the link, using puppeth from the XDPoS Chain repo to generate bootnode.key and genesis.json.
• As per the aforementioned guide, clone the Local_DPoS_Setup repo and replace genesis.json and bootnode.key.
• Update .env to include your private keys.
• Edit run.sh to change the project directory and the enode urls generated from the first step.

However, I am getting the following error at the very last step, after setting everything up and executing run.sh.

Error Message:

Fatal: Error starting protocol stack: bad bootstrap/fallback node "enode://b68a56b438e08a1a4f6c4f88aa54b34e88a902433f8027aa2ceadd772dd637c37496fc9a7a5e9220b4a7e492b60bd52b1d2827b7eea0e3089e56c79d9f93045c@[::]:30301" (invalid IP (multicast/unspecified))

Here's my run.sh file:

Any help/advice debugging this would be much appreciated!