Adding Listener in Classic Load Balancer stuck in 'Pending Create'

I am trying to add my SSL certificate (issued on ACM) into my environment with these settings:

Port: 443
Protocol: HTTPS
Instance Port: 80
Instance Protocol: HTTP

When I click Add, the listener is just stuck in 'pending create'. I had waited more than an hour and its still not created. What could be the issue? Is there a way to check errors to why it is not created?

Edited by: Kalesvol on Jul 20, 2020 2:55 PM

Nvm. I'm an idiot.