Symptoms

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When you impersonate a user and then try to re-impersonate your own user account, the Impersonate User popup window shows an error Failed API level ACL Validation

Release

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All releases.

Cause

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Missing a required role, snc_internal, for the RESTAPIProcessor Access Control (ACL) record.

Resolution

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1. Go to System Security > Access Control (ACL)

2. Filter for Name is RESTAPIProcessor

3. Open the matching record

4. Under the Requires Role related list, if you see a role that has a blank Sys user role, double click the blank value and in the suggestions popup, find and select the snc_internal role. Click the green checkmark to save the change.

5. Save the ACL record.

After performing these steps, you should be able to impersonate other users and re-impersonate yourself without getting the error.