<?xml version="1.0" encoding="UTF-8"?>
<project ...>
  <modelVersion></modelVersion>
  <dependencies></dependencies>
  some other tags
  <code copied from @BarBozz comment>
</project>
@BarBozz solutions gives me this
Exception in thread "main" java.lang.NoSuchMethodError: kotlin.collections.ArraysKt.copyInto([B[BIII)[B
	at okio.Segment.writeTo(Segment.kt:169)
	at okio.Segment.compact(Segment.kt:152)
	at okio.Buffer.write(Buffer.kt:1842)
	at okio.Buffer.read(Buffer.kt:1854)
	at okio.Buffer.writeAll(Buffer.kt:1642)
	at okio.Options$Companion.buildTrieRecursive(Options.kt:187)
	at okio.Options$Companion.buildTrieRecursive(Options.kt:174)
	at okio.Options$Companion.buildTrieRecursive$default(Options.kt:113)
	at okio.Options$Companion.of(Options.kt:72)
	at okhttp3.internal.Util.<clinit>(Util.kt:71)
	at okhttp3.internal.concurrent.TaskRunner.<clinit>(TaskRunner.kt:309)
	at okhttp3.ConnectionPool.<init>(ConnectionPool.kt:41)
	at okhttp3.ConnectionPool.<init>(ConnectionPool.kt:47)
	at okhttp3.OkHttpClient$Builder.<init>(OkHttpClient.kt:471)
	at org.web3j.protocol.http.HttpService.createOkHttpClient(HttpService.java:138)
	at org.web3j.protocol.http.HttpService.<init>(HttpService.java:118)
I'm using Spring Boot
Solved only by removing the BarBozz solutions from <dependencyManagement> and adding these to main <dependencies>:
<dependency>
    <groupId>com.squareup.okhttp3</groupId>
    <artifactId>okhttp</artifactId>
    <version>4.9.1</version>
</dependency>
<dependency>
    <groupId>org.jetbrains.kotlin</groupId>
    <artifactId>kotlin-stdlib</artifactId>
    <version>1.3.70</version>
</dependency>
Let Spring complains about version override.
          
For anyone using gradle:
implementation 'org.web3j:core:5.0.0'
implementation 'com.squareup.okhttp3:okhttp:4.9.3'
will fix the problem.
          
I'm still seeing this bug. Setting the versions as suggested in the last two comments didn't help. Tested with:
java 17
quarkus 2.13.3.Final
kotlin 1.7.20
web3j 4.8.9 and 4.9.4
Going back to older versions (Java 11, Quarkus 2.1.2, Kotlin 1.4.32) solves the issue for me - without having to include a dependency to okhttp.
Is there anyone out there to fix this bug?

If you are using maven, add this dependency in your pom file.
<dependency>
	<groupId>com.squareup.okhttp3</groupId>
	<artifactId>okhttp</artifactId>
	<version>4.10.0</version>
</dependency>
          
For me the solution is now to not using the quarkus-bom.

So remove the line (when using Gradle)
implementation(enforcedPlatform("${quarkusPlatformGroupId}:${quarkusPlatformArtifactId}:${quarkusPlatformVersion}"))
and instead append ":${quarkusPlatformVersion}" to all quarkus dependencies. This way the okhttp version is not getting fixed to 3.x.x by the quarkus bom.
Works with
Quarkus 3.0.3
web3j:core:4.9.8
          
It's still na issue for me even if I have already added suggested dependency.
Java 17
        <dependency>
            <groupId>org.web3j</groupId>
            <artifactId>core</artifactId>
            <version>4.9.7</version>
        </dependency>
        <dependency>
            <groupId>com.squareup.okhttp3</groupId>
            <artifactId>okhttp</artifactId>
            <version>4.9.3</version>
        </dependency>
java.lang.NoSuchMethodError: 'okhttp3.RequestBody okhttp3.RequestBody.create(java.lang.String, okhttp3.MediaType)'
	at org.web3j.protocol.http.HttpService.performIO(HttpService.java:159) ~[core-4.9.7.jar:na]
	at org.web3j.protocol.Service.send(Service.java:48) ~[core-4.9.7.jar:na]
	at org.web3j.protocol.core.Request.send(Request.java:87) ~[core-4.9.7.jar:na]
Can anyone help me please?
      NoSuchMethodError: 'okhttp3.RequestBody okhttp3.RequestBody.create(java.lang.String, okhttp3.MediaType)'
      #1990