Pulsechain Token Approval/Revoke

We need to be able to revoke token approvals, like so: https://etherscan.io/tokenapprovalchecker RH tweeted that https://revoke.cash/ is live on Pulse - but it's throwing an error: Error: Request failed with status code 403

Is there anyway to do it manually?

I believe this is the issue behind many people getting the following error from Metamask when attempting to "Enable Token" Error Unexpected error. Could not estimate gas for the approve.

Please advise