Adding repo on Debian: no valid OpenPGP data found

[dosch]

Describe the bug: Adding repo on Raspberry Pi OS doesn't work

Steps to reproduce the behavior:

1. Enter sudo add-apt-repository ppa:openshot.developers/ppa in the terminal

Output:

 This PPA contains the official stable releases of libopenshot (OpenShot Video Library), libopenshot-audio (OpenShot Audio Library), and openshot-qt (OpenShot Video Editor).

If you are looking for unstable, daily builds of OpenShot 2.x/3.x, please go here: https://launchpad.net/~openshot.developers/+archive/ubuntu/libopenshot-daily

If you are looking for older builds of the depreciated OpenShot 1.x, please go here: https://code.launchpad.net/~openshot.developers/+archive/daily
 More info: https://launchpad.net/~openshot.developers/+archive/ubuntu/ppa
Press [ENTER] to continue or ctrl-c to cancel adding it

gpg: keybox '/tmp/tmp1cja65p0/pubring.gpg' created
gpg: /tmp/tmp1cja65p0/trustdb.gpg: trustdb created
gpg: key 52165BD6B9BA26FA: public key "Launchpad OpenShot Development PPA" imported
gpg: Total number processed: 1
gpg:               imported: 1
Warning: apt-key is deprecated. Manage keyring files in trusted.gpg.d instead (see apt-key(8)).
gpg: no valid OpenPGP data found.

Expected behavior: External repo is added, but can't be used. After running sudo apt update the following errors are thrown:

E: The repository 'http://ppa.launchpad.net/openshot.developers/ppa/ubuntu noble Release' does not have a Release file.

System Details: Model : Raspberry Pi 4 Model B Rev 1.4 OS: Raspberry Pi OS. Linux version 6.1.21-v8+ (dom@buildbot) (aarch64-linux-gnu-gcc-8 (Ubuntu/Linaro 8.4.0-3ubuntu1) 8.4.0, GNU ld (GNU Binutils for Ubuntu) 2.34) #1642 SMP PREEMPT Mon Apr 3 17:24:16 BST 2023

[Colorjet3]

I have assigned this to the lead developer.