Set up a new plasmic-app and I get this error: Error: invalid json response body at <https://codegen.plasmic.app/api/v1/loader/code/preview?platform=nextjs&projectId=68gH9oYPj63zvHhx13QAod> reason: Unexpected token < in JSON at position 0
Also, any route β/β is empty on page preview, other pages and components works with preview.