C3 Scorm plug-in ported to C3 runtime with added C3 Preview mode support (no worker mode support).
The exact bug
In your addon, we have the following:
addon.json → "id": "scormc2_2"
plugin.js → SDK.Plugins.scormc2 = class ...
plugin.js → SDK.Lang.PushContext("plugins.scormc2")
lang/en-US.json → "plugins": { "scormc2": { ... } }