Unable to start Prisma Client error when I run prisma studio

[mhdalmajid]

1. Prisma version (prisma -v or npx prisma -v):

➜  myweb yarn prisma -v
yarn run v1.22.10
$ D:\Desktop\myweb\node_modules\.bin\prisma -v
Environment variables loaded from .env
prisma               : 2.19.0
@prisma/client       : 2.19.0
Current platform     : windows
Query Engine         : query-engine c1455d0b443d66b0d9db9bcb1bb9ee0d5bbc511d (at node_modules\@prisma\engines\query-engine-windows.exe)
Migration Engine     : migration-engine-cli c1455d0b443d66b0d9db9bcb1bb9ee0d5bbc511d (at node_modules\@prisma\engines\migration-engine-windows.exe)
Introspection Engine : introspection-core c1455d0b443d66b0d9db9bcb1bb9ee0d5bbc511d (at node_modules\@prisma\engines\introspection-engine-windows.exe)
Format Binary        : prisma-fmt c1455d0b443d66b0d9db9bcb1bb9ee0d5bbc511d (at node_modules\@prisma\engines\prisma-fmt-windows.exe)
Studio               : 0.358.0

2. Logs from Developer Tools Console or Command line, if any:

➜  myweb yarn prisma studio
yarn run v1.22.10
$ D:\Desktop\myweb\node_modules\.bin\prisma studio
Environment variables loaded from .env
Prisma schema loaded from prisma\schema.prisma
Starting Prisma Studio ...
Generating Prisma Client ... done
Prisma Studio is up on http://localhost:5555
Unable to start Prisma Client:  C:\Users\utbah\AppData\Roaming\Prisma\Studio\fcde89c2\index.js:194
path.join(process.cwd(), './C:\Users\utbah\AppData\Roaming\Prisma\Studio\fcde89c2\schema.prisma');
                                    ^^^^^^

SyntaxError: Invalid Unicode escape sequence
    at wrapSafe (internal/modules/cjs/loader.js:979:16)
    at Module._compile (internal/modules/cjs/loader.js:1027:27)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
    at Module.load (internal/modules/cjs/loader.js:928:32)
    at Function.Module._load (internal/modules/cjs/loader.js:769:14)
    at Module.require (internal/modules/cjs/loader.js:952:19)
    at require (internal/modules/cjs/helpers.js:88:18)
    at PCW.start (D:\Desktop\myweb\node_modules\prisma\build\index.js:100018:171)
    at PrismaService.respond (D:\Desktop\myweb\node_modules\prisma\build\index.js:100285:65)
    at D:\Desktop\myweb\node_modules\prisma\build\index.js:102458:65
Unable to start Prisma Client:  C:\Users\utbah\AppData\Roaming\Prisma\Studio\fcde89c2\index.js:194
path.join(process.cwd(), './C:\Users\utbah\AppData\Roaming\Prisma\Studio\fcde89c2\schema.prisma');
                                    ^^^^^^

3. Does the issue persist even after updating to the latest prisma alpha? (npm i -D @prisma/cli@dev)
   yes
4. Prisma schema (if relevant):

// This is your Prisma schema file,
// learn more about it in the docs: https://pris.ly/d/prisma-schema

datasource db {
  provider = "postgresql"
  url      = env("DATABASE_URL")
}

generator client {
  provider = "prisma-client-js"
}

enum Role {
  USER
  ADMIN
}

model User {
  id        Int      @id @default(autoincrement())
  email     String   @unique
  password  String
  name      String?
  role      Role     @default(USER)
  posts     Post[]
  profile   Profile?
  createdAt DateTime @default(now())
  updatedAt DateTime @default(now())
}

model Profile {
  id     Int    @id @default(autoincrement())
  bio    String
  user   User   @relation(fields: [userId], references: [id])
  userId Int
}

model Post {
  id                Int                 @id @default(autoincrement())
  createdAt         DateTime            @default(now())
  title             String
  content           String
  published         Boolean             @default(false)
  author            User                @relation(fields: [authorId], references: [id])
  authorId          Int
  categories        Category[]          @relation(references: [id])
  CategoriesOnPosts CategoriesOnPosts[]
}

model Category {
  id                Int                 @id @default(autoincrement())
  name              String
  posts             Post[]              @relation(references: [id])
  CategoriesOnPosts CategoriesOnPosts[]
}

model CategoriesOnPosts {
  post       Post     @relation(fields: [postId], references: [id])
  postId     Int // relation scalar field (used in the `@relation` attribute above)
  category   Category @relation(fields: [categoryId], references: [id])
  categoryId Int // relation scalar field (used in the `@relation` attribute above)
  createdAt  DateTime @default(now())

  @@id([postId, categoryId])
}

[mhdalmajid]

I should mention that I installed Prisma studio.exe and deleted it.

[sdnts]

Hey @mhdalmajid, thanks for reporting this!

Did this only start happening with 2.19.0? Can you give 2.18.0 a shot and see if that works?
Looking at the stacktrace, the issue is pretty clear: the path is obviously UNIX-like even though you're on Windows. I don't remember changing anything about paths, so I'm curious about 2.18.0.

Also: are you only seeing this with Studio? Are you able to use @prisma/client in a separate script?

The Electron app you mentioned and the Prisma CLI's Studio share the same codebase, so it is likely that both of them are broken. Although one does not affect the other.

[mhdalmajid]

Hey @madebysid
everything works well but not Prisma studio
I created testing_project and tried studio but still the same issue
studio.exe work well,I installed it again but yarn Prisma studio still the same issue

[mhdalmajid]

@sdnts should we close this? I think this been fixed