Problems while searching for a new upstream version

package:
openems
severity:
high
created:
2018-11-22
last updated:
2019-03-24

uscan had problems while searching for a new upstream version:
In debian/watch no matching files for watch line
  http://openems.de/download/src/openEMS-v(\S+)\.tar\.(?:bz2|gz|xz)