If you haven't already contacted support, you should do so. This issue is likely due to protocol jars missing or not in the proper folder or it could be that ecs-ec-ingress is not loading the jar files properly. There was a known issue logged initially against Amazon AWS as APAR IJ28708 for ecs-ec-ingress not loading files, but depending on your version I would get support to confirm if the correct files are located in the /opt/ibm/si/services/ecs-ec-ingress/eventgnosis/lib/q1labs/ directory.
If any of the required files are not present, it can cause the error you mentioned. It might also be a deploy issue, but I would get support to confirm if you have not already done so.
#QRadar#Support#SupportMigration