Server Error: 503 Service Unavailable

My apologies for what is probably a simple issue, but I can’t see what I’ve done wrong.

I’ve installed the free trial version, selecting the Designer and Integration Server and choosing the embedded database engine. The Integration Server seems to start fine, and the Integration Server Administrator connects to the server fine, but when I start the Software AG Designer I get the following error:

Connection failed for localhost:5555 ([ISC.0064.9324] Server Error: 503 Service Unavailable)
[ISC.0064.9324] Server Error: 503 Service Unavailable

I’m using the same credentials in the Designer as work for the Integration Server Administrator.

What have I missed?

I found the problem: Proxy settings in Designer. I set them to Manual and all is well.

Thank you for your time.