Hello Ganimede,
Please check if following background jobs have been scheduled
REFRESH_ADMIN_DATA_FROM_SUPPORT
The job reads administrative data from the SAP support systems via the SAP-OSS RFC connection, periodically, and buffers it in the SAP Solution Manager system. This data is required for service connections and for the Support Desk (e.g. system data synchronization with the SAP Support Portal).
ABAP program:
AI_SC_REFRESH_READ_ONLY_DATA
Start time: Immediate execution.
Execution interval: Daily.
Also Note: The user under which the job runs needs SAP Support Portal system data maintenance authorization. The user who created the job must be in the table AISUSER
Also check if Note Note 1528436 - Insufficient error info when creating new notifications can be applied in your system.
I suppose you are using service desk functionality from solution manager.
Regards,
Archana