https://extdist.wmflabs.org/dist/extensions/VisualEditor-REL1_23-9883566.tar.gz is 404.
Topic on Extension talk:VisualEditor
Hmm, that's odd. I thought that we disabled VE in ExtensionDistributor for MediaWiki 1.22 and 1.23, but it's still listed there? I don't think a working build of VE for 1.23 exists through that system, though a git checkout should work (but be exceedingly old). @Legoktm, any ideas?
Please note that we don't provide support to third parties for VisualEditor, and "LTS" is a misnomer at best.
Filed as Phab:T121748. We currently don't have a way an extension can hide itself in ExtensionDistributor, short of deleting git branches :(. If we want/need that kind of functionality, please file a bug for it.
VisualEditor-REL1_23-9883566.tar.gz is broken