Unable to Edit Tasks Error : "Insufficient Access Rights on Object ID"

Ensure that "Edit" on Task is enabled in the user’s Profile

Sharing settings are correctly configured:

• Activity Sharing:  Controlled by Parent
• User has Edit access to the Task record (via queue ownership)
• User has Edit access to the related parent record (e.g. Account, Case, Opportunity) 

This issue is caused by Restriction Rules on the Task object which block Queue members from editing Tasks owned by the Queue, even when standard sharing and permissions are correctly configured.

Note: If the Activity Sharing Setting is set to "Controlled by Parent", the user must also have Edit access on the related record (e.g. Account, Opportunity) for full edit rights on the Task. However, even with this access, Restriction Rules override and cause the "Insufficient access rights on object id" error.