Let's Encrypt证书是有次数限制的,一般为3次,多次申请就会提示Too many certificates already,所以在申请Let's Encrypt证书时请注意这一点:
Too many certificates already
Sign failed: “detail”:”Error creating new cert :: Too many certificates already issued for exact set of domains:
Let's Encrypt证书重复申请次数太多就会提示报错,报错后需要1周时间才可以重复申请。