Problems while searching for a new upstream version

package:
antlr-maven-plugin
severity:
high
created:
2017-11-21
last updated:
2019-07-17

uscan had problems while searching for a new upstream version:
In watchfile debian/watch, reading webpage
  http://svn.codehaus.org/mojo/tags/ failed: 500 Can't connect to svn.codehaus.org:80