Last modified: 2013-10-19 16:07:31 UTC
The link is generated as https://en.wikipedia.org/wiki/Wikipedia:WikiProject_Software/tag#Quality_scale.23Quality_scale (note the stray .23)
This is an issue with that template (doesn't work correctly when you use a section link for ASSESSMENT_LINK). Report it at [[en:WP:VPT]], not here.