No routeModule available to create server routes

[AlemTuzlak]

I'm using React Router as a...

framework

Reproduction

Not provided unfortunately

System Info

Fly.io/github actions

Used Package Manager

pnpm

Expected Behavior

Works without crashing

Actual Behavior

So we have a super frustrating issue on our website that has been happening since v2.15 of remix and now since v7.0.0 release of react-router. After a few days/weeks/months on random machines we get the following error mesage:

Error: No `routeModule` available to create server routes
 
invariant2(react-router.dist.development:chunk-D52XG6IA)

which crashes our website and results in an unhandled "Unexpected server error" shown. This happens because the error happens inside of react-router itself:

Here is the stack trace from sentry:

Here is our dockerfile:

# syntax = docker/dockerfile:1.4

# Adjust NODE_VERSION as desired
ARG NODE_VERSION=20
FROM node:${NODE_VERSION}-slim as base

# Remix/Prisma app lives here
WORKDIR /app

# Throw-away build stage to reduce size of final image
FROM base as build
ARG PNPM_VERSION=9.7.0
RUN npm install -g pnpm@$PNPM_VERSION

# Install packages needed to build node modules
RUN apt-get update -qq && \
    apt-get install --no-install-recommends -y \
        build-essential \
        node-gyp \
        openssl \
        pkg-config \
        python-is-python3 \
        ca-certificates \
        fuse3 \
        sqlite3 \
        curl && \
    rm -rf /var/lib/apt/lists /var/cache/apt/archives

# Install node modules
COPY --link pnpm-lock.yaml package.json ./
RUN pnpm install --prefer-offline --prod=false

# Generate Prisma Client
COPY --link prisma .
RUN pnpm run prisma:generate

# Copy application code
COPY --link . .
 
# Set production environment
ENV NODE_ENV="production"

RUN pnpm run build

# Remove development dependencies
RUN pnpm prune --prod

FROM build as runner
# Copy built application
COPY --from=build /app /app 

EXPOSE ${PORT}

CMD ["pnpm", "run", "start"]

We are not sure why this would happen and we've also noticed that the stack trace includes the development distribution of react-router, I'm guessing this could be the cause of it?

If you need additional info let me know

[GabenGar]

React router only exports development modules, that's why you see it in the stack.
Presumably it is a temporary solution, but most likely unrelated to your problem.