Illegal character in scheme name at index 5: https, https://

[Marc Kandler]

Hey guys,

so our Bamboo instance (7.1.4 build 70122) has problems with the trigger from new commits to Bitbucket after we upgraded it. Bamboo is running behind a reverse proxy.

After investigating, I found the following underlying problem, at least I assume so:

[http-nio-8085-exec-16] [ThrowableExceptionMapper] Uncaught exception thrown by REST service: Illegal character in scheme name at index 5: https, https://my.server.com/bamboo/rest/remote-event-consumer/latest/events/stash-branch-changed-remote-event
java.net.URISyntaxException: Illegal character in scheme name at index 5: https, https://my.server.com/bamboo/rest/remote-event-consumer/latest/events/stash-branch-changed-remote-event
at java.net.URI$Parser.fail(URI.java:2848)
at java.net.URI$Parser.checkChars(URI.java:3021)

[...]

It was running before the upgrade just fine. So my question is:
Where does the "https, " before the actual URL come all of a sudden? How do I fix the problem? The configuration was taken from the previous installation, and I followed the migration guide.