Couldn't find remote error when getsrc for swi-fx30-catm_4.0.0

I could download swi-fx30-catm_4.0.0 which is R15 stable release early June. And it looks no longer the case, can anyone advise what’s happening? @cchenry, @lpacyk

r15wirepas@M2M-DT-BZ:~$ leaf getsrc swi-linux
Run sync steps for fx30-catm-linux-src_15.0.4.001

Ready to sync in /home/r15wirepas/swi-linux-src directory:
repo init -u ssh://git@github.com/legatoproject/manifest -m products/fx30-catm/releases/Release15.xml -g default,-cache,proprietary ; repo sync

Proceed? (Y/n)
Y
Checking credentials...

Your identity is: Bill Zhou <bill.zhou@m2mconnectivity.com.au>
If you want to change this, please re-run 'repo init' with --config-name

repo has been initialized in /home/r15wirepas/swi-linux-src/
If this is not the directory in which you want to initialize repo, please run:
   rm -r /home/r15wirepas/swi-linux-src//.repo
and try again.
Fetching:  0% (0/60) warming up
fatal: Couldn't find remote ref refs/tags/20.09.0.rc1

legato-3rdParty-libcbor:
fatal: Couldn't find remote ref refs/tags/20.09.0.rc1
legato-3rdParty-libcbor: sleeping 4.0 seconds before retrying
fatal: Couldn't find remote ref refs/tags/20.09.0.rc1

legato-3rdParty-libcbor:
fatal: Couldn't find remote ref refs/tags/20.09.0.rc1
error: Cannot fetch legato-3rdParty-libcbor from https://github.com/legatoproject/legato-3rdParty-libcbor

fatal: Couldn't find remote ref refs/tags/21.03.0.rc1
...

I think I found the culprit - the below commit 5 days ago looks wrong, and breaks the FX30 R15 getsrc,

The temporary solution is to roll legato.xml back to previous version before this commit. If the owner of this repository can comment with an official fix would be the best.

@billzhou there was some miscommunication and changes accidentally made. We have resolved the issue.

@lpacyk thanks for your prompt response and fix.
I can confirm no issue getsrc for R15 now.
However, would like to bring your notice that the Traversing symlinks not allow is still there.