RH436 Practice: Configuring Cluster Notifications not working

Hello,
I'm working on a practice about Configuring cluster notifications, when I setup the practice I'm getting all sorts of errors, I already reset all my nodes(including nodea where the script is getting errors from and my workstation. These are the errors I'm getting:

I removed the errors and followed the advice in the responses the create a support ticket

Can this be looked at? I haven't had any problems with the other labs. And just wanted to mention/complain I find the Lab environment Extremely slow, I would expect a better/faster lab environment for the price that you pay for a learning subscription. It takes a long time for the machines to boot, resetting takes a long time when you revert to default for doing a new lab or practice, and when typing sometimes the key gets stuck causing something to show up like thissssssssssssssssssssssssssss. And lastly I have had several times that one of the virtual machines lost network connection for some reason, so I would be working in a node, and the network connection would get lost, ending back in the workstation machine.