Hi,
I think there is a bug somewere in the soft used to post on twitter updates from https://letsencrypt.status.io/ : it's not the first time that the link is invalid:
https://twitter.com/letsencrypt_ops/status/987029551531212801 :
We are updating Boulder to +a1b98d9. Changelog is https://github.com/letsencrypt/boulder/compare/699c7e4...a1b9 …... http://letsencrypt.status.io
The diff link https://github.com/letsencrypt/boulder/compare/699c7e4...a1b9 should be Comparing 699c7e4...a1b98d9 · letsencrypt/boulder · GitHub
Other tweets with broken link:
https://twitter.com/letsencrypt_ops/status/979403462365536256
https://twitter.com/letsencrypt_ops/status/951618362995490816