Since some Months, its no longer possible to add TXT Records with the Name "_acme-challenge" to the base domain.
To override the fallback value, you must use a CNAME and proxy it.
For example.
CNAME _acme-challenge.yourdomain.com => proxy_acme-challenge.yourdomain.com
The TXT Records have to be created on proxy_acme-challenge.yourdomain.com
Since the default CNAME TTL is 3600 seconds, it is recommended to leave the CNAME record.
But if you would like to use the build-in SSL (for your web-site etc.) from one.com, you have to delete the record.
A new variable "ONECOM_KeepCnameProxy" you can set in the account.conf is used to keep the CNAME record.
By default the CNAME record will be removed.
For ex.: SAVED_ONECOM_KeepCnameProxy='1'
to keep the CNAME Record and speedup the process.
https://dnsapi.cn has change the default language to cn other then en. So the api call need to add `lang=en` to url params for getting the english messages.
And, They also change the susccess message from "Action completed successful" to "Operation successful". Simply use "successful" as keyword will be fine.