Getting this error when trying to use email sign in: java.lang.NoClassDefFoundError: kotlinx/serialization/internal/InstantSerializer

[MukundiCode]

I've just started using Supabase-kt for a project I'm building and I'm just setting up the auth endpoints. I've been having issues with serialization when the user logs in and supabase sends back a response to my app. I'll share the stacktrace (maybe not all of it), and my current gradle settings
Stacktrace:
`Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Async processing failed: java.lang.NoClassDefFoundError: kotlinx/serialization/internal/InstantSerializer] with root cause

java.lang.ClassNotFoundException: kotlinx.serialization.internal.InstantSerializer
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641) ~[na:na]
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188) ~[na:na]
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526) ~[na:na]
at io.github.jan.supabase.auth.user.UserInfo$$serializer.deserialize(UserInfo.kt:9) ~[auth-kt-jvm-3.2.2.jar:na]
at io.github.jan.supabase.auth.user.UserInfo$$serializer.deserialize(UserInfo.kt:9) ~[auth-kt-jvm-3.2.2.jar:na]
at kotlinx.serialization.json.internal.PolymorphicKt.decodeSerializableValuePolymorphic(Polymorphic.kt:77) ~[kotlinx-serialization-json-jvm-1.6.3.jar:na]
at kotlinx.serialization.json.internal.AbstractJsonTreeDecoder.decodeSerializableValue(TreeJsonDecoder.kt:52) ~[kotlinx-serialization-json-jvm-1.6.3.jar:na]
at kotlinx.serialization.json.internal.TreeJsonDecoderKt.readJson(TreeJsonDecoder.kt:25) ~[kotlinx-serialization-json-jvm-1.6.3.jar:na]
at kotlinx.serialization.json.Json.decodeFromJsonElement(Json.kt:127) ~[kotlinx-serialization-json-jvm-1.6.3.jar:na]
at io.github.jan.supabase.auth.providers.builtin.Email.decodeResult(Email.kt:39) ~[auth-kt-jvm-3.2.2.jar:na]
at io.github.jan.supabase.auth.providers.builtin.Email.decodeResult(Email.kt:17) ~[auth-kt-jvm-3.2.2.jar:na]
at io.github.jan.supabase.auth.providers.builtin.DefaultAuthProvider.signUp$suspendImpl(DefaultAuthProvider.kt:110) ~[auth-kt-jvm-3.2.2.jar:na]
at io.github.jan.supabase.auth.providers.builtin.DefaultAuthProvider$signUp$1.invokeSuspend(DefaultAuthProvider.kt) ~[auth-kt-jvm-3.2.2.jar:na]
at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33) ~[kotlin-stdlib-2.2.0.jar:2.2.0-release-294]...`

Gradle:
`plugins {
kotlin("jvm") version "2.2.0"
kotlin("plugin.spring") version "2.2.0"
kotlin("plugin.serialization") version "2.2.0"
id("org.springframework.boot") version "3.5.0"
id("io.spring.dependency-management") version "1.1.7"
id("org.cyclonedx.bom") version "2.3.0"
}
...
dependencies {
implementation("org.springframework.boot:spring-boot-starter-web")
implementation("com.fasterxml.jackson.module:jackson-module-kotlin")
implementation("org.jetbrains.kotlin:kotlin-reflect")
implementation("com.squareup.okhttp3:okhttp:4.12.0")

// Use kotlinx-serialization version compatible with Supabase 3.1.4
implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.9.0")
implementation("org.jetbrains.kotlinx:kotlinx-datetime:0.6.0")
compileOnly("org.projectlombok:lombok")
annotationProcessor("org.projectlombok:lombok")
testImplementation("org.springframework.boot:spring-boot-starter-test")
testImplementation("org.jetbrains.kotlin:kotlin-test-junit5")
testRuntimeOnly("org.junit.platform:junit-platform-launcher")
implementation("org.jetbrains.kotlinx:kotlinx-coroutines-reactor:1.9.0")

val ktorVersion = "3.2.2"
implementation("io.ktor:ktor-client-core:$ktorVersion")
implementation("io.ktor:ktor-client-java:$ktorVersion")
implementation("io.ktor:ktor-client-cio:$ktorVersion")

implementation(platform("io.github.jan-tennert.supabase:bom:3.2.2"))

// implementation("io.github.jan-tennert.supabase:serializer-jackson:3.2.2")
implementation("io.github.jan-tennert.supabase:postgrest-kt")
implementation("io.github.jan-tennert.supabase:auth-kt")
}
`
I've tried different permutations of using different versions of the serializer or using a less recent version of supabase-kt.

Thank you

[jan-tennert]

I don't know if you have discord, but this user had the exact same issue. https://discord.com/channels/839993398554656828/1396458331186663514

1. Use KotlinX Datetime 0.7.1
2. Spring Boot dependency management seems to be messing up things. Removing it fixed it for me.

[MukundiCode]

This worked. Thank you so much