connect hcp to both ECC and BW

Hello,

Currently I can connect HCP to ECC system and create custom Fiori Apps. I'm now trying to connect to BW system so that I can create custom Fiori Apps based on Bex queries.

I have added the BW system to the SCC as below and created a destination for BW in HCP:

HCP destination:

But when I tried to create a project in WebIDE, I'm getting the following error. I have already activated the services in BW via SICF.

Any idea why I'm getting the service unavailable error? Is this because of HCP free trial account's limitation where I can only have one on-premise connection?