[TYPO3-core] Announcing TYPO3 CMS 7.6.20 LTS and 8.7.3 LTS

[Johannes Regner]

Hi, i hope this is the right place. But i've tried to update the core, once from 8.7.1 to 8.7.3 and three other installation from 8.7.2 to 8.7.3. I always get the following error on the backend:

New TYPO3 CMS core checksum mismatch
The official TYPO3 CMS version system on https://get.typo3.org expects a sha1 checksum of 399ac40fb19cc5a76d63e74341e4633f3ca6e923 from the content of the downloaded new TYPO3 CMS core version 8.7.3. The actual checksum is bf10480c20a98011895b2b624183bd7e9f61a7a6. The update is stopped. This may be a failed download, an attack, or an issue with the typo3.org infrastructure.

What can i do?