Hi,
I understand that you are facing a
MUTATE_NOT_ALLOWED error while trying to create an ad. To assist you further, please provide us with complete API
request and
response logs with the
request ID and
request header generated for adGroupAds:mutate method.
If you are using a client library and haven't enabled the logging yet, I would request you to enable logging for the specific client library that you are using. You can refer to the guides
Java,
.Net,
PHP,
Python,
Ruby or
Perl to enable logging at your end. For REST interface requests, you can enable logging via the curl command by using the -i flag.