It looks like the domain name occd.cloudns.ph is rate limited. Many people issue subdomains for the cloudns.ph and you are affected by them. You should contact that provider to request a Rate Limit Increase from Let's Encrypt. Your message is a little different from the docs but I am guessing that is a language translation issue. The limit is:
The main limit is Certificates per Registered Domain (50 per week). A registered domain is, generally speaking, the part of the domain you purchased from your domain name registrar. For instance, in the name www.example.com, the registered domain is example.com. In new.blog.example.co.uk, the registered domain is example.co.uk. We use the Public Suffix List to calculate the registered domain. Exceeding the Certificates Per Registered Domain limit is reported with the error message too many certificates already issued, possibly with additional details.
See this Let's Encrypt page for more details
I tried looking up that name on crt.sh but there were so many I could not get a complete list. There is not much you can do except try again and hopefully a new spot becomes available. This will affect you on future renewals so the long-term solution is for the provider to request a rate limit increase. This is not just affecting you but all people who use that domain. Refer them to the Overrides section in the doc I linked to above
And, welcome to the community @cool