Posting this here at a suggestion from the author’s Discord.
Running 0.8.9, updated the D&D Beyond Importer module to its latest version (2.4.8), and it simply disappeared from the module list all together.
I tried uninstalling/reinstalling with no results. Still says it is installed on the Forge Bazaar, but it does not appear in Foundry itself as an available module.
No errors that I can see on F12 - it simply appears like it’s not installed.