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https://optimizeyourimage.com/docs/problems/custom-domain-taken

What it means

This hostname is already registered — on this account or another one.

How to resolve it

If you own the domain and did not register it here, contact support.

Retrying

Not retryable with the same hostname unless it is released.

Include the X-Request-Id response header when contacting [email protected] about a specific failure.