Steps to replicate the issue (include links if applicable):

• Go to https://github.com/wikimedia/mediawiki-extensions-WikibaseLexeme/tree/master
• Following the installation instructions, go to https://www.mediawiki.org/wiki/Extension:WikibaseLexeme
• Following the steps on that page, fetch the code from git and load the extension from LocalSettings.php
• Create a new lexeme in the wiki

What happens?:

When trying to display the lexeme, it gives an error like:

[becd8666a3aa1e63c1efdfdd] 2024-03-15 15:41:59: Fatal exception of type "Error"

After adding $wgShowExceptionDetails = true; in LocalSettings.php:

[1456d04f1f12a14bc825f32b] /wiki/Lexeme:L1 Error: Class "WMDE\VueJsTemplating\Templating" not found

What should have happened instead?:

Following the steps in the installation instructions should result in a working installation

Software version (skip for WMF-hosted wikis like Wikipedia):

MediaWiki 1.41 and the REL_1.41 branches of Wikibase and WikibaseLexeme

Other information (browser name/version, screenshots, etc.):

The last time I tried to install WikibaseLexeme with REL1_39 I had the same problem (I don't remember what I eventually did to get it to work, only that it was by far the most difficult out of all the extensions I installed).