Cannot install RH AMT while installing all from Central with early access

eclipse.buildId=4.21.0.I20210906-0500
java.version=16.0.2
java.vendor=Oracle Corporation
BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US
Framework arguments:  -product org.eclipse.epp.package.jee.product
Command-line arguments:  -data file:/home/odockal/eclipse-workspace_2021-09+JBT4211Final/ -os linux -ws gtk -arch x86_64 -product org.eclipse.epp.package.jee.product

org.jboss.tools.discovery.core
Error
Thu Dec 16 14:26:58 CET 2021
Problems occurred while performing installation: The following connectors are not available: Red Hat Application Migration Toolkit (id=org.jboss.tools.windup.feature.feature.group, site=http://download.jboss.org/jbosstools/photon/stable/updates/rhamt/)

org.eclipse.core.runtime.CoreException: The following connectors are not available: Red Hat Application Migration Toolkit (id=org.jboss.tools.windup.feature.feature.group, site=http://download.jboss.org/jbosstools/photon/stable/updates/rhamt/)
    at org.jboss.tools.discovery.core.internal.connectors.PrepareInstallProfileJob.checkForUnavailable(PrepareInstallProfileJob.java:374)
    at org.jboss.tools.discovery.core.internal.connectors.PrepareInstallProfileJob.computeInstallableUnits(PrepareInstallProfileJob.java:284)
    at org.jboss.tools.discovery.core.internal.connectors.PrepareInstallProfileJob.run(PrepareInstallProfileJob.java:116)
    at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:122)