[Kesseki]

Although I only post here personally, I work for Let’s Encrypt.

[number6]

Thanks you for your work!

[ofrzeta]

It would be better to say this upfront. I am not blaming you in any way but this would prevent responses such as the parent's (hopefully).

[dlcarrier]

Let them know that they're having an outage. If their monitors aren't telling them so, they might need to host them off-site.

[Kesseki]

Let's Encrypt is operating normally. If you're having trouble, please post the details on the community forum so that folks can help you out. There is external monitoring in place.