node:internal/errors:464
9:07:48 PM: ErrorCaptureStackTrace(err);
9:07:48 PM: ^
9:07:48 PM: TypeError [ERR_IMPORT_ASSERTION_TYPE_MISSING]: Module "file:///opt/build/repo/.contentlayer/generated/Blog/blog__BLANK.mdx.json" needs an import assertion of type
But I have --experimental-json-modules as a build option
I am really stumped when I remove the offending json files it works, strangely i have a newsletter which works very similarly ending with .json and it works.