S-RAMP requires Errai 2.4.0. The Integration Platform BOM currently contains version 2.4.0.Beta1. Please upgrade Errai from 2.3.2 to 2.4.0.Beta1
Errai was upgraded to 2.4.0.CR1 in community projects in master and 6.0.x branch (0.3.x in UberFire case) master https://github.com/droolsjbpm/uberfire/commit/65c32b71d https://github.com/droolsjbpm/droolsjbpm-build-bootstrap/commit/ec09d0a4f https://github.com/droolsjbpm/guvnor/commit/3875da181 https://github.com/droolsjbpm/kie-wb-common/commit/6e7a74876 https://github.com/droolsjbpm/drools-wb/commit/56c63f9d3 https://github.com/droolsjbpm/jbpm-form-modeler/commit/3ea2151f9 https://github.com/droolsjbpm/jbpm-designer/commit/1d29a0235 https://github.com/droolsjbpm/jbpm-console-ng/commit/6c51f3717 https://github.com/droolsjbpm/kie-wb-distributions/commit/7341de96e 0.3.x https://github.com/droolsjbpm/uberfire/commit/61ac78727 6.0.x https://github.com/droolsjbpm/droolsjbpm-build-bootstrap/commit/75f1b466b https://github.com/droolsjbpm/guvnor/commit/ac2b87f45 https://github.com/droolsjbpm/kie-wb-common/commit/5ef1d3ec8 https://github.com/droolsjbpm/drools-wb/commit/d8b2ae0ca https://github.com/droolsjbpm/jbpm-form-modeler/commit/5aa42cc84 https://github.com/droolsjbpm/jbpm-designer/commit/de0680f48 https://github.com/droolsjbpm/jbpm-console-ng/commit/70123336c https://github.com/droolsjbpm/kie-wb-distributions/compare/b98b1fe...7b0dd75
drools 6.0.0.CR2 uses errai 2.3.2.Final: https://github.com/droolsjbpm/droolsjbpm-build-bootstrap/blob/6.0.0.CR2/kie-parent-with-dependencies/pom.xml
ER3 contains Erra 2.4.0.Beta1. VERIFIED.