Webserver fails to start if VillagerShops is installed

[tmarback]

If I install the VillagerShops plugin into the server, the Web-Api webserver gives this error during initialization, and I can't access it from the browser (reloading all plugins gives me the "webserver started" message, but still no access from the browser). If I remove VillagerShops, it works fine. The VillagerShops plugin itself seems to be working fine.

It feels like this plugin is just incompatible with Web-Api for whatever reason, and the webserver crashes when it encounters that instead of just skipping it.

This occurs on Web-Api 5.4.5 and 5.4.6.