Given following log snippets, their explanation, and nothing else, explain what failure, if any, occurred during build of this package.

  Snippets are in a format of [X] : [Y], where [X] is a log snippet, and [Y] is the explanation.

  Snippets are delimited with '================'.

  Drawing on information from all snippets, provide a concise explanation of the issue and recommend a solution.

  Explanation of the issue, and recommended solution, should take a handful of sentences.

  Snippets:

  [cmd: ['rpkg', 'srpm', '--outdir', '/var/lib/copr-rpmbuild/results', '--spec', '/var/lib/copr-rpmbuild/workspace/workdir-5nxhm5kx/thunderbird-nightly-copr/thunderbird-nightly.spec']
cwd: /var/lib/copr-rpmbuild/workspace/workdir-5nxhm5kx/thunderbird-nightly-copr
rc: 1
stdout: Wrote: /var/lib/copr-rpmbuild/results/thunderbird-nightly.spec
stderr: warning: Downloading https://ftp.mozilla.org/pub/thunderbird/nightly/latest-comm-central-l10n/thunderbird-92.0a1.en-US.linux-x86_64.tar.bz2 to /var/lib/copr-rpmbuild/results/thunderbird-92.0a1.en-US.linux-x86_64.tar.bz2
curl: (22) The requested URL returned error: 404
error: Executing url helper "/usr/bin/curl --proto -all,+https,+ftps  --silent --show-error --fail --globoff --location -o /var/lib/copr-rpmbuild/results/thunderbird-92.0a1.en-US.linux-x86_64.tar.bz2 https://ftp.mozilla.org/pub/thunderbird/nightly/latest-comm-central-l10n/thunderbird-92.0a1.en-US.linux-x86_64.tar.bz2" failed with status 22
error: Couldn't download https://ftp.mozilla.org/pub/thunderbird/nightly/latest-comm-central-l10n/thunderbird-92.0a1.en-US.linux-x86_64.tar.bz2
]: [Attempt to download remote file `https://ftp.mozilla.org/pub/thunderbird/nightly/latest-comm-central-l10n/thunderbird-92.0a1.en-US.linux-x86_64.tar.bz2` has failed due to error 404.]

Issue: Requested file couldn't be downloaded due to http error 404. This status code indicates that the origin server did not find a current representation for the target resource or is not willing to disclose that one exists.  A 404 status code does not indicate whether this lack of representation is temporary or permanent.
Resolution: Verify URL of the file you need. It ispossible that URL may simply be incorrect, and that the file exists at a different path. Contact administrator of the server if it appears that the issue is caused by a mistake on their part. 