Hi Nghia,
I'm from the Google Ads API team.
In order for us to further investigate, can you please provide the complete request and response logs with request ID where you've encountered an error? Also, it would be great if you can provide the ID of the campaign that you created so we can take a closer look at its difference with a Display campaign. You may send it to us via Reply privately to author option.
For future reference, you may check this link for the available campaign subtypes and this link for the available campain types in the API. For more information, I suggest you check this link as well.
Regards,
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Google Ads API Team |