The Salesforce Spring '26 release added the adherence of data spaces in Data Cloud. You might see an error concerning connection/integration authorization, Data Processing Engine when working with Data 360 objects, and other Data 360 features.
For connection/integration authorization, if a data space is not assigned, this error will be displayed:
{"error":"access_denied","error_description":"end-user denied authorization"}
For DPE, when trying to pull records from Data 360 objects, this error will be displayed:
Failed to establish dataspace context Error code: FAILED_TO_ESTABLISH_DATASPACE_CONTEXT and Error type: SYSTEM_ERROR
For some Data 360 features, if a data space is not assigned, this error will be displayed:
"The data provider is either invalid or no longer exists."
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