ACS ErrorPageHandlerService can't be resolved
I'm trying to use the ACS ErrorPageHandlerService [1] and it has successfully worked in the past (AEM 6.0 SP1). I just build some (totally unrelated) simple code and now the error pages don't work anymore, see error below:
30.12.2014 12:50:10.005 *ERROR* [0:0:0:0:0:0:0:1 [1419972610002] GET /favicon.ico HTTP/1.1] org.apache.sling.servlets.resolver.internal.SlingServletResolver Calling the error handler resulted in an error java.lang.Error: Unresolved compilation problems: Only a type can be imported. com.adobe.acs.commons.errorpagehandler.ErrorPageHandlerService resolves to a package ErrorPageHandlerService cannot be resolved to a type ErrorPageHandlerService cannot be resolved to a type
In the system console (/system/console/bundles) I can see that the bundle is active and the ErrorPageHandlerService even shows up in the list of services (/system/console/services). Why would it not be resolvable?
[1] http://adobe-consulting-services.github.io/acs-aem-commons/
PS: I tried to search the forums but it seems it's always under construction or something or at least the search shows me a blank page in 90% of cases...