Hi Elena,
this is bad luck as I am not used to 9.0. I am currently migrating from 7.1 to 9.5 with some intermittent local tests on 8.2.
Additionally can you check for the following line in infradc.cnf:
metadataLoaded=…
Set it to false and restart your InfrastructureDC.
Are there any InfrastructureDC-Modules deployed to it?
Check your optimize environment for the InfrastructureDC.
Regards,
Holger
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