Can't install Atlassian SDK in Linux

I’m running into an issue where I can not install the Atlas SDK in Ubuntu. I receive the following error now during an apt-get update:

Err:16 https://packages.atlassian.com/debian/atlassian-sdk-deb stable Release
Unknown date format Bad header data [IP: 18.234.32.196 443]

Is there anything I can do to work around this issue?

Already reported here: https://community.developer.atlassian.com/t/the-repository-https-packages-atlassian-com-atlassian-sdk-deb-stable-release-is-not-signed/

Workround:

Try to use https://packages.atlassian.com/atlassian-sdk-deb instead of https://packages.atlassian.com/debian/atlassian-sdk-deb