SpringBoot SpringBootApplication fails upon upgrading to latest version

I am using the following dependencies ...

 <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-web</artifactId>
     <version>${springboot.version}</version>
 </dependency>

<dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-webflux</artifactId>
      <version>${springboot.version}</version>
</dependency>

<dependency>
    <groupId>org.springframework.session</groupId>
    <artifactId>spring-session-jdbc</artifactId>
    <version>${springsession.version}</version>
</dependency>

<dependency>
    <groupId>org.springframework.session</groupId>
    <artifactId>spring-session-jdbc</artifactId>
    <version>${springsession.version}</version>
</dependency>

... with ...

<properties>
    <springboot.version>3.3.13</springboot.version>
    <springsession.version>3.3.7</springsession.version>
</properties>

... and my app runs fine, but if I upgrade to anything 3.4 or greater, e.g. ...

<properties>
        <springboot.version>3.5.3</springboot.version>
        <springsession.version>3.5.1</springsession.version>
</properties>

... I get the following exception upon running my app. I can't figure out why this would be. Nothing changes but the versions of the indicated spring jars. Any assistance greatly appreciated.

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'clientHttpRequestFactoryBuilder' defined in class path resource [org/springframework/boot/autoconfigure/http/client/HttpClientAutoConfiguration.class]: Failed to instantiate [org.springframework.boot.http.client.ClientHttpRequestFactoryBuilder]: Factory method 'clientHttpRequestFactoryBuilder' threw exception with message: org/apache/hc/client5/http/ssl/TlsSocketStrategy
        at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:657)
        at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:645)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1375)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1205)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:569)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:529)
        at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:339)
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:373)
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:337)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.instantiateSingleton(DefaultListableBeanFactory.java:1222)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingleton(DefaultListableBeanFactory.java:1188)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:1123)
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:987)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:627)
        at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146)
        at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:752)
        at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:439)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:318)
        at org.springframework.boot.builder.SpringApplicationBuilder.run(SpringApplicationBuilder.java:149)
        at com.animalus.core.http.AUBootApp.runIt(AUBootApp.java:18)
        at com.animalus.critterspot.http.CritterspotBootApplication.main(CritterspotBootApplication.java:32)
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.http.client.ClientHttpRequestFactoryBuilder]: Factory method 'clientHttpRequestFactoryBuilder' threw exception with message: org/apache/hc/client5/http/ssl/TlsSocketStrategy
        at org.springframework.beans.factory.support.SimpleInstantiationStrategy.lambda$instantiate$0(SimpleInstantiationStrategy.java:199)
        at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiateWithFactoryMethod(SimpleInstantiationStrategy.java:88)
        at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:168)
        at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:653)
        ... 21 common frames omitted
Caused by: java.lang.NoClassDefFoundError: org/apache/hc/client5/http/ssl/TlsSocketStrategy
        at org.springframework.boot.http.client.HttpComponentsHttpClientBuilder.<init>(HttpComponentsHttpClientBuilder.java:60)
        at org.springframework.boot.http.client.HttpComponentsClientHttpRequestFactoryBuilder.<init>(HttpComponentsClientHttpRequestFactoryBuilder.java:52)
        at org.springframework.boot.http.client.ClientHttpRequestFactoryBuilder.httpComponents(ClientHttpRequestFactoryBuilder.java:97)
        at org.springframework.boot.http.client.ClientHttpRequestFactoryBuilder.detect(ClientHttpRequestFactoryBuilder.java:218)
        at org.springframework.boot.autoconfigure.http.client.ClientHttpRequestFactories.builder(ClientHttpRequestFactories.java:55)
        at org.springframework.boot.autoconfigure.http.client.HttpClientAutoConfiguration.clientHttpRequestFactoryBuilder(HttpClientAutoConfiguration.java:68)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:569)
        at org.springframework.beans.factory.support.SimpleInstantiationStrategy.lambda$instantiate$0(SimpleInstantiationStrategy.java:171)
        ... 24 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.apache.hc.client5.http.ssl.TlsSocketStrategy
        at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
        at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:525)
        ... 35 common frames omitted

Comment From: snicoll

@crowmagnumb a pom excerpt doesn't make the report actionable. Please edit your description and attach a small sample that actually shows the problem. Perhaps you've overridden the Apache HttpClient version in your project?