What is the reason for receiving an error message stating "permission denied" when attempting to access the public schema on pgAdmin 4?

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The reason for receiving an error message stating "permission denied" when attempting to access the public schema on pgAdmin 4 may vary. However, there are some common causes including:

1. Insufficient privileges: The user may not have sufficient privileges to access the public schema.

2. Security restrictions: There may be security restrictions applied to the public schema, limiting its access to certain users or roles.

3. Object ownership: The public schema may be owned by a different user or role, preventing others from accessing it.

4. Incorrect login details: The user may have entered incorrect login details, preventing them from accessing the public schema.

To resolve the issue, check the user's permissions, security restrictions, object ownership, and login details to ensure they have the necessary access to the public schema.