CLIError codes
PLUGIN_ADMIN_WIDGET_NOT_JSON
A plugin's admin widget holds a value that cannot be sent to the browser as JSON.
Cause
A plugin's admin widget holds a value that cannot be sent to the browser as JSON.
A plugin's contributes.admin.widgets are sent to the admin as JSON, in one response for the whole workspace. A function, class instance, Date, Map or bigint cannot be, and would fail that response for every admin. The message names the widget and its keys at fault.
Fix
- Remove the keys listed from the widget, or give them values of strings, numbers, booleans, null, arrays or plain objects.
- If the plugin is not yours, update it to a release whose widgets are plain JSON.
Example
✗ Plugin "reviews" contributes an admin widget "stats" that is not JSON (keys: query).
Why: It is serialized into /api/admin-meta/workspace, so it may hold only strings, numbers, booleans, null, arrays and plain objects — no functions, class instances, Dates, Maps or bigints. A bigint in query.where throws while the whole workspace payload is serialized, which fails that request for every admin rather than just this card.
Next: Remove `query` from the widget in `contributes.admin.widgets`, or give it a value of strings, numbers, booleans, null, arrays or plain objects.
Docs: https://nextlyhq.com/docs/cli/errors/plugin-admin-widget-not-json (PLUGIN_ADMIN_WIDGET_NOT_JSON)