Hey ppl, I'm just implementing <example> from official site, it runs fine in :android: but have issu...

# multiplatform

[Ninoosvanidze]

Hey ppl, I'm just implementing example from official site, it runs fine in 🤖 but have issue in iOS, returns, I see the same issue in github, shows already fixed but still here, using 🥹

val ktorVersion = "2.1.2"

Exception doesn't match @Throws-specified class list and thus isn't propagated from Kotlin to Objective-C/Swift as NSError.

It is considered unexpected and unhandled instead. Program will be terminated.

Uncaught Kotlin exception: kotlin.native.concurrent.InvalidMutabilityException: mutation attempt of frozen io.ktor.client.request.HttpRequestPipeline@1cfa708

[Ninoosvanidze]

thats all the code

[hfhbd]

Just a guess, do you use the new MM or Kotlin 1.7.20+? Alternative, you could try to put the client as private variable.

[Ninoosvanidze]

```kotlin("multiplatform")

kotlin("plugin.serialization") version "1.7.21"```

...

implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.6.4")

[Ninoosvanidze]

1.7.10

was multiplatform version, updating now

[Ninoosvanidze]

🎉

[hfhbd]

Yeah, 1.7.20 enables the new MM by default. Using the old MM is not supported with Ktor 2. And you should use the same version for Kotlin and Kotlin plugin serialization

[Ninoosvanidze]

thanks a lot