Install on clean Focal fails with repo signature problems - kaltura

Cross posting to try to get some assistance, github has not yielded any comment yet.
https://github.com/kaltura/platform-install-packages/issues/707
After adding in the kaltura repos per instruction, the following errors appear on Focal.
Any ideas on getting around the signature problems?
root#kaltura:~# apt update
Hit:1 http://security.ubuntu.com/ubuntu focal-security InRelease
Get:2 http://installrepo.kaltura.org/repo/aptn/focal propus InRelease [1,426 B]
Hit:3 http://archive.ubuntu.com/ubuntu focal InRelease
Err:2 http://installrepo.kaltura.org/repo/aptn/focal propus InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY DE7AA37623C65ECB
Hit:4 http://archive.ubuntu.com/ubuntu focal-updates InRelease
Hit:5 http://archive.ubuntu.com/ubuntu focal-backports InRelease
Reading package lists... Done
W: GPG error: http://installrepo.kaltura.org/repo/aptn/focal propus InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY DE7AA37623C65ECB
E: The repository 'http://installrepo.kaltura.org/repo/aptn/focal propus InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

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Err:3 http://bd.old-releases.ubuntu.com/ubuntu focal-updates InRelease
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Hit:12 https://repos.codelite.org/ubuntu focal InRelease
Err:13 https://repos.codelite.org/ubuntu ubuntu Release
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Ign:15 http://ppa.launchpad.net/damien-moore/codeblocks-stable/ubuntu focal InRelease
Hit:16 http://ppa.launchpad.net/yannubuntu/boot-repair/ubuntu focal InRelease
Err:17 http://ppa.launchpad.net/damien-moore/codeblocks-stable/ubuntu focal Release
404 Not Found [IP: 185.125.190.52 80]
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Fetched 17.2 MB in 2s (7,544 kB/s)
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Ign:1 cdrom://Ubuntu 16.04 LTS _Xenial Xerus_ - Release amd64 (20160420.1) xenial InRelease
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Ign:6 http://archive.ubuntu.com/ubuntu xenial-updates InRelease
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