Problems while searching for a new upstream version

package:
msmtp
severity:
high
created:
2019-02-19
last updated:
2019-03-25

uscan had problems while searching for a new upstream version:
In debian/watch no matching files for watch line
  https://gitlab.marlam.de/marlam/msmtp/tags?sort=updated_desc .*/archive\.tar\.gz\?ref=msmtp-([0-9\.]+)