Video SDK — "This account does not exist or does not belong to you" (errorCode 200) on a new Build Platform account, fails even with the official sample

I have a newly created Zoom Build Platform (CPaaS) Video SDK account (free trial, status Active, created today). When joining a session I always get:

{type: ‘JOIN_MEETING_FAILED’, reason: ‘This account does not exist or does not belong to you’, errorCode: 200}

This happens with the official Video SDK Web sample (v2.4.5), using the SDK Key / SDK Secret taken directly from the Video SDK account’s Build App → SDK Credentials (not API key/secret).

The JWT is minimal and valid:
app_key = aSLFxCUjHzsqWhlNwZPFN3UZBLGxVIwjObHt, tpc (33 chars, alphanumeric), role_type: 1, valid iat/exp (HS256, server clock correct, exp ~2h).

I have verified the key/secret byte-for-byte against the Build App page, removed session_key/user_identity, and shortened the topic — same error every time.

Since even Zoom’s own official sample fails with my own credentials, this appears to be an account provisioning issue. Could you please activate/provision my Video SDK account (Account: CPAAS_A_1NPDdMRARL-JFH-MUtsEUw) for sessions? Thanks.

@Lubomir I’ll PM you for a sample of the token