can't install from JBT Central

!MESSAGE The following connectors are not available: Subclipse + SVNKit (id=org.tigris.subversion.subclipse.feature.group, org.tigris.subversion.clientadapter.svnkit.feature.feature.group, net.java.dev.jna.feature.group, org.tigris.subversion.subclipse.graph.feature.feature.group, org.tmatesoft.svnkit.feature.group, site=http://download.jboss.org/jbosstools/oxygen/stable/updates/), JBoss Maven Portlet Configurator (Deprecated) (id=org.jboss.tools.maven.portlet.feature.feature.group, site=http://download.jboss.org/jbosstools/oxygen/stable/updates/), TestNG (id=org.testng.eclipse.feature.group, site=http://download.jboss.org/jbosstools/oxygen/stable/updates/), JBoss Maven Spring Boot Configurator (id=org.jboss.tools.maven.seam.feature.feature.group, site=http://download.jboss.org/jbosstools/oxygen/stable/updates/), Maven Integration for WRO4J (m2e-wro4j) (id=org.jboss.tools.m2e.wro4j.feature.feature.group, site=http://download.jboss.org/jbosstools/oxygen/stable/updates/), JBoss Tools LiveReload (Deprecated) (id=org.jboss.tools.livereload.feature.feature.group, site=http://download.jboss.org/jbosstools/oxygen/stable/updates/), Subclipse + SVNKit: Mylyn Support (id=org.tigris.subversion.subclipse.feature.group, org.tigris.subversion.clientadapter.svnkit.feature.feature.group, org.tigris.subversion.subclipse.mylyn.feature.feature.group, net.java.dev.jna.feature.group, org.tigris.subversion.subclipse.graph.feature.feature.group, org.tmatesoft.svnkit.feature.group, org.eclipse.mylyn_feature.feature.group, org.eclipse.mylyn.ide_feature.feature.group, org.eclipse.mylyn.commons.feature.group, org.eclipse.mylyn.context_feature.feature.group, org.eclipse.mylyn.bugzilla_feature.feature.group, org.eclipse.mylyn.java_feature.feature.group, org.eclipse.mylyn.pde_feature.feature.group, org.eclipse.mylyn.team_feature.feature.group, org.eclipse.mylyn.versions.feature.group, site=http://download.jboss.org/jbosstools/oxygen/stable/updates/), JBoss Seam 3 Tools (Deprecated) (id=org.jboss.tools.cdi.seam.feature.feature.group, site=http://download.jboss.org/jbosstools/oxygen/stable/updates/), JBoss Hybrid Mobile Tools + CordovaSim (Deprecated) (id=org.jboss.tools.aerogear.easymport.feature.feature.group, org.jboss.tools.aerogear.thym.feature.feature.group, org.jboss.tools.cordovasim.feature.feature.group, org.jboss.tools.browsersim.feature.feature.group, org.jboss.tools.livereload.feature.feature.group, org.jboss.tools.feedhenry.feature.group, site=http://download.jboss.org/jbosstools/oxygen/stable/updates/), Tycho Project Configurators (id=org.sonatype.tycho.m2e.feature.feature.group, site=http://download.jboss.org/jbosstools/oxygen/stable/updates/), Spring IDE (id=org.springframework.ide.eclipse.aop.feature.feature.group, org.springframework.ide.eclipse.autowire.feature.feature.group, org.springframework.ide.eclipse.batch.feature.feature.group, org.springframework.ide.eclipse.data.feature.feature.group, org.springframework.ide.eclipse.feature.feature.group, org.springframework.ide.eclipse.integration.feature.feature.group, org.springframework.ide.eclipse.maven.feature.feature.group, org.springframework.ide.eclipse.mylyn.feature.feature.group, org.springframework.ide.eclipse.osgi.feature.feature.group, org.springframework.ide.eclipse.security.feature.feature.group, org.springframework.ide.eclipse.webflow.feature.feature.group, org.eclipse.mylyn.bugzilla_feature.feature.group, site=http://download.jboss.org/jbosstools/oxygen/stable/updates/), SonarLint for Eclipse (id=org.sonarlint.eclipse.feature.feature.group, site=http://download.jboss.org/jbosstools/oxygen/stable/updates/), JBoss Seam 2 Tools (Deprecated) (id=org.jboss.tools.runtime.seam.detector.feature.feature.group, org.jboss.tools.seam.feature.feature.group, org.jboss.tools.maven.seam.feature.feature.group, org.jboss.tools.project.examples.seam.feature.feature.group, site=http://download.jboss.org/jbosstools/oxygen/stable/updates/), JBoss Maven Seam Configurator (Deprecated) (id=org.jboss.tools.maven.seam.feature.feature.group, site=http://download.jboss.org/jbosstools/oxygen/stable/updates/), JBoss Portlet Tools (Deprecated) (id=org.jboss.tools.portlet.feature.feature.group, site=http://download.jboss.org/jbosstools/oxygen/stable/updates/), Eclipse EGit: Mylyn Support (id=org.eclipse.jgit.feature.group, org.eclipse.egit.feature.group, org.eclipse.egit.mylyn.feature.group, org.eclipse.mylyn.github.feature.feature.group, org.eclipse.mylyn.git.feature.group, org.eclipse.mylyn_feature.feature.group, org.eclipse.mylyn.ide_feature.feature.group, org.eclipse.mylyn.commons.feature.group, org.eclipse.mylyn.context_feature.feature.group, org.eclipse.mylyn.bugzilla_feature.feature.group, org.eclipse.mylyn.java_feature.feature.group, org.eclipse.mylyn.pde_feature.feature.group, org.eclipse.mylyn.team_feature.feature.group, org.eclipse.mylyn.versions.feature.group, site=http://download.jboss.org/jbosstools/oxygen/stable/updates/), Eclipse Checkstyle (id=net.sf.eclipsecs.feature.group, com.github.sevntu.checkstyle.checks.feature.feature.group, site=http://download.jboss.org/jbosstools/oxygen/stable/updates/), Mylyn Issue Tracker Connectors (id=org.jboss.tools.common.mylyn.feature.feature.group, org.eclipse.mylyn_feature.feature.group, org.eclipse.mylyn.ide_feature.feature.group, org.eclipse.mylyn.commons.feature.group, org.eclipse.mylyn.context_feature.feature.group, org.eclipse.mylyn.bugzilla_feature.feature.group, org.eclipse.mylyn.java_feature.feature.group, org.eclipse.mylyn.pde_feature.feature.group, org.eclipse.mylyn.team_feature.feature.group, org.eclipse.mylyn.versions.feature.group, site=http://download.jboss.org/jbosstools/oxygen/stable/updates/), Hudson + Jenkins: Mylyn Support (id=org.eclipse.mylyn.hudson.feature.group, site=http://download.jboss.org/jbosstools/oxygen/stable/updates/)