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What it means

Your partner account has been suspended, so partner-level operations are refused. This is distinct from insufficient_scope, which is about a single token’s scopes — partner_suspended applies to the whole client regardless of the token presented. Today this is only returned by GET /v1/webhooks/test, since that is the one partner-level action in the public API. A suspended partner’s existing access tokens continue to authenticate against the read endpoints until they expire.

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What to do

There’s nothing to fix in your request. Suspension is an account-level state set by DSS. Contact admin@digitalseaservice.com, quoting the instance request ID, to find out why and to get reinstated.