can’t use kotlinx.serialization with maven

I have followed the instructions provided on the kotlinx.serialization github page but when I try to serialize my class, it throws the following runtime exception

Mark the class as @Serializable or provide the serializer explicitly. 

My assumption is that compiler plugin is not kicking in. The dependency only downloaded when I ran kotlin:compile from maven and is issuing the following warning

[INFO] Scanning for projects... [INFO] [INFO] ----------------------< net.Kilobyte1000:ElectFX >---------------------- [INFO] Building ElectFX 1.0-SNAPSHOT [INFO] --------------------------------[ jar ]--------------------------------- [INFO] [INFO] --- kotlin-maven-plugin:1.4.21:compile (default-cli) @ ElectFX --- [INFO] Applied plugin: 'kotlinx-serialization' WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.intellij.util.ReflectionUtil (file:/C:/Users/Name/.m2/repository/org/jetbrains/kotlin/kotlin-compiler/1.4.21/kotlin-compiler-1.4.21.jar) to method java.util.ResourceBundle.setParent(java.util.ResourceBundle) WARNING: Please consider reporting this to the maintainers of com.intellij.util.ReflectionUtil WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 7.557 s [INFO] Finished at: 2021-01-25T12:16:21+05:30 [INFO] ------------------------------------------------------------------------ 

Here is my pom file, in case it provides any help

xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>net.Kilobyte1000</groupId> <artifactId>ElectFX</artifactId> <version>1.0-SNAPSHOT</version> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>14</maven.compiler.source> <maven.compiler.target>14</maven.compiler.target> <kotlin.version>1.4.21</kotlin.version> <serialization.version>1.0.1</serialization.version> </properties> <dependencies> <dependency> <groupId>org.openjfx</groupId> <artifactId>javafx-controls</artifactId> <version>14</version> </dependency> <dependency> <groupId>org.openjfx</groupId> <artifactId>javafx-fxml</artifactId> <version>14</version> </dependency> <dependency> <groupId>org.jfxtras</groupId> <artifactId>jmetro</artifactId> <version>11.6.12</version> </dependency> <dependency> <groupId>com.jfoenix</groupId> <artifactId>jfoenix</artifactId> <version>9.0.10</version> </dependency> <dependency> <groupId>org.jetbrains.kotlin</groupId> <artifactId>kotlin-stdlib-jdk8</artifactId> <version>${kotlin.version}</version> </dependency> <dependency> <groupId>org.jetbrains.kotlin</groupId> <artifactId>kotlin-test</artifactId> <version>${kotlin.version}</version> <scope>test</scope> </dependency> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-text</artifactId> <version>1.9</version> </dependency> <dependency> <groupId>org.jetbrains.kotlinx</groupId> <artifactId>kotlinx-serialization-json-jvm</artifactId> <version>${serialization.version}</version> <scope>compile</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.openjfx</groupId> <artifactId>javafx-maven-plugin</artifactId> <version>0.0.4</version> <configuration> <mainClass>edu.opjms.candidateSelector.main.Main</mainClass> <launcher>start</launcher> <jlinkImageName>ElectFX</jlinkImageName> <compress>2</compress> <noManPages>true</noManPages> <noHeaderFiles>true</noHeaderFiles> </configuration> </plugin> <plugin> <groupId>com.gluonhq</groupId> <artifactId>client-maven-plugin</artifactId> <version>0.1.26</version> <configuration> <mainClass>edu.opjms.candidateSelector.main.Main</mainClass> </configuration> </plugin> <plugin> <groupId>org.jetbrains.kotlin</groupId> <artifactId>kotlin-maven-plugin</artifactId> <version>${kotlin.version}</version> <executions> <execution> <id>compile</id> <phase>compile</phase> <goals> <goal>compile</goal> </goals> </execution> <execution> <id>test-compile</id> <phase>test-compile</phase> <goals> <goal>test-compile</goal> </goals> </execution> </executions> <configuration> <jvmTarget>14</jvmTarget> <compilerPlugins> <plugin>kotlinx-serialization</plugin> </compilerPlugins> </configuration> <dependencies> <dependency> <groupId>org.jetbrains.kotlin</groupId> <artifactId>kotlin-maven-serialization</artifactId> <version>1.4.21</version> </dependency> </dependencies> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.8.0</version> <executions> <execution> <id>compile</id> <phase>compile</phase> <goals> <goal>compile</goal> </goals> </execution> <execution> <id>testCompile</id> <phase>test-compile</phase> <goals> <goal>testCompile</goal> </goals> </execution> </executions> <configuration> <release>14</release> <source>14</source> <target>14</target> </configuration> </plugin> </plugins> </build> </project> 

submitted by /u/Kilobyte1000
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