Github tag (release) branch deploy has stopped working?

I want to bind GitHub tag (release) branch for production deployment.
But It seems to be stopped woking now.
It worked before.
Is there any problem or something has changed?

10:34:51 AM: Build ready to start
10:34:53 AM: build-image version: 2dbd444fcdce00cf06325060a8238d5ae3e86774
10:34:53 AM: build-image tag: v3.3.7
10:34:53 AM: buildbot version: d305548225ac57bb00eb5a596b0b8674e76a4681
10:34:53 AM: Fetching cached dependencies
10:34:53 AM: Starting to download cache of 254.9KB
10:34:53 AM: Finished downloading cache in 61.173252ms
10:34:53 AM: Starting to extract cache
10:34:53 AM: Failed to fetch cache, continuing with build
10:34:53 AM: Starting to prepare the repo for build
10:34:54 AM: git ref refs/heads/v0.0.0 does not exist or you do not have permission
10:34:54 AM: Failing build: Failed to prepare repo
10:34:54 AM: failed during stage ‘preparing repo’: git ref refs/heads/v0.0.0 does not exist
10:34:54 AM: Finished processing build request in 877.17833ms

Although I can jump v0.0.0@HEAD link (Github repo) from the deploy detail page.
So I wondered.

Based on the following:

It seems like our buildbot lost permissions to your repository. Can you try re-linking it as mentioned here: [Common Issue] "...does not exist or you do not have permission" with failing builds?