This similar problem happens to me, I don’t know if I already have an idea how to eliminate the error. Since I read the message there is talk of a package that was removed, but I don’t have this same package in use. Or how to check if it is being used? (This error is sometimes triggered, not all the time).
Yes, the problem happens sometimes, it is the doubt that I have. It is not a frequent error, but it is uncomfortable, since before this they were giving me error 500, but with a try-catch I solved it, but now from time to time it throws this error.
Do you webpack your lambda resolver(s) before you upload it to the Dgraph server? If yes, check what’s in your package.json. In most cases a good rule of thumb is not to use many external packages, since most (lambda) operations can be done natively with via node anyway.