Does not work jenkins-pipeline with building in docker container

i am really can’t understand, how to use Jenkinsfile or pipeline to build something, that i want to git clone from sources. If i am cloning manually to workspace directory of the project. This works for me

node('mymachine') {
  stage "Run in container"
  docker.image('maven:latest').inside {
    sh "mvn clean package"
  }
}

But i want each time to get fresh sources of my project via call of button build.
I created Pipeline script from SCM where i have already pushed Jenkinsfile with

node('mymachine') {
  stage "Run in container"
  docker.image('maven:latest').inside {
    sh "mvn clean package"
  }
}

Also, i put repository url in the job. But it does not download sources.
Also, i tried this

node('mymachine') {
stages {
  stage('Get sources') {
    steps {
     checkout scm
    }
  }
  stage('Run in container') {
  docker.image('maven:latest').inside
    sh "mvn clean package"
  }
}
}

In a result i have

[Pipeline] {
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline
java.lang.NoSuchMethodError: No such DSL method 'stages' found among steps [acceptGitLabMR, addGitLabMRComment, archive, bat, build, catchError, checkout, deleteDir, dir, dockerFingerprintFrom, dockerFingerprintRun, dockerNode, echo, emailext, emailextrecipients, envVarsForTool, error, fileExists, findBuildScans, getContext, git, gitlabBuilds, gitlabCommitStatus, input, isUnix, junit, library, libraryResource, load, lock, mail, milestone, node, parallel, powershell, properties, pwd, readFile, readTrusted, resolveScm, retry, script, sh, sleep, sshagent, stage, stash, step, svn, timeout, timestamps, tm, tool, unarchive, unstable, unstash, updateGitlabCommitStatus, validateDeclarativePipeline, waitUntil, warnError, withContext, withCredentials, withDockerContainer, withDockerRegistry, withDockerServer, withEnv, wrap, writeFile, ws] or symbols [all, allOf, always, ant, antFromApache, antOutcome, antTarget, any, anyOf, apiToken, architecture, archiveArtifacts, artifactManager, attach, authorizationMatrix, batchFile, booleanParam, branch, brokenBuildSuspects, brokenTestsSuspects, buildButton, buildDiscarder, buildParameter, buildingTag, caseInsensitive, caseSensitive, certificate, changeRequest, changelog, changeset, checkoutToSubdirectory, choice, choiceParam, cleanWs, clock, cloud, command, copyArtifactPermission, copyArtifacts, credentials, cron, crumb, culprits, defaultView, demand, developers, disableConcurrentBuilds, disableResume, docker, dockerCert, dockerfile, downloadSettings, downstream, dumb, durabilityHint, envVars, environment, equals, expression, file, fileParam, filePath, fingerprint, frameOptions, freeStyle, freeStyleJob, fromScm, fromSource, git, gitHubBranchDiscovery, gitHubBranchHeadAuthority, gitHubForkDiscovery, gitHubTagDiscovery, gitHubTrustContributors, gitHubTrustEveryone, gitHubTrustNobody, gitHubTrustPermissions, gitLabConnection, gitParameter, github, githubPush, gitlab, gradle, headRegexFilter, headWildcardFilter, hyperlink, hyperlinkToModels, inheriting, inheritingGlobal, installSource, isRestartedRun, jdk, jdkInstaller, jgit, jgitapache, jnlp, jobName, label, lastCompleted, lastDuration, lastFailure, lastGrantedAuthorities, lastStable, lastSuccess, lastSuccessful, lastWithArtifacts, latestSavedBuild, legacy, legacySCM, list, local, location, logRotator, loggedInUsersCanDoAnything, masterBuild, maven, maven3Mojos, mavenErrors, mavenMojos, mavenWarnings, modernSCM, myView, newContainerPerStage, node, nodeProperties, nonInheriting, none, not, overrideIndexTriggers, paneStatus, parallelsAlwaysFailFast, parameters, password, pattern, permalink, permanent, pipeline-model, pipelineTriggers, plainText, plugin, pollSCM, preserveStashes, projectNamingStrategy, proxy, queueItemAuthenticator, quietPeriod, rateLimitBuilds, recipients, requestor, run, runParam, sSHLauncher, schedule, scmRetryCount, scriptApprovalLink, search, security, shell, skipDefaultCheckout, skipStagesAfterUnstable, slave, sourceRegexFilter, sourceWildcardFilter, specific, ssh, sshPublisher, sshPublisherDesc, sshTransfer, sshUserPrivateKey, stackTrace, standard, status, string, stringParam, swapSpace, tag, text, textParam, tmpSpace, toolLocation, triggeredBy, unsecured, upstream, upstreamDevelopers, userSeed, usernameColonPassword, usernamePassword, viewsTabBar, weather, withAnt, workspace, zfs, zip] or globals [currentBuild, docker, env, params, pipeline, scm]
    at org.jenkinsci.plugins.workflow.cps.DSL.invokeMethod(DSL.java:200)
    at org.jenkinsci.plugins.workflow.cps.CpsScript.invokeMethod(CpsScript.java:122)
    at sun.reflect.GeneratedMethodAccessor506.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1213)
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1022)
    at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:42)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
    at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:158)
    at org.kohsuke.groovy.sandbox.GroovyInterceptor.onMethodCall(GroovyInterceptor.java:23)
    at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.SandboxInterceptor.onMethodCall(SandboxInterceptor.java:157)
    at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:156)
    at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:160)
    at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:130)
    at com.cloudbees.groovy.cps.sandbox.SandboxInvoker.methodCall(SandboxInvoker.java:17)
    at WorkflowScript.run(WorkflowScript:2)
    at ___cps.transform___(Native Method)
    at com.cloudbees.groovy.cps.impl.ContinuationGroup.methodCall(ContinuationGroup.java:84)
    at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.dispatchOrArg(FunctionCallBlock.java:113)
    at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.fixArg(FunctionCallBlock.java:83)
    at sun.reflect.GeneratedMethodAccessor355.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.cloudbees.groovy.cps.impl.ContinuationPtr$ContinuationImpl.receive(ContinuationPtr.java:72)
    at com.cloudbees.groovy.cps.impl.ClosureBlock.eval(ClosureBlock.java:46)
    at com.cloudbees.groovy.cps.Next.step(Next.java:83)
    at com.cloudbees.groovy.cps.Continuable$1.call(Continuable.java:174)
    at com.cloudbees.groovy.cps.Continuable$1.call(Continuable.java:163)
    at org.codehaus.groovy.runtime.GroovyCategorySupport$ThreadCategoryInfo.use(GroovyCategorySupport.java:129)
    at org.codehaus.groovy.runtime.GroovyCategorySupport.use(GroovyCategorySupport.java:268)
    at com.cloudbees.groovy.cps.Continuable.run0(Continuable.java:163)
    at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.access$001(SandboxContinuable.java:18)
    at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.run0(SandboxContinuable.java:51)
    at org.jenkinsci.plugins.workflow.cps.CpsThread.runNextChunk(CpsThread.java:186)
    at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.run(CpsThreadGroup.java:370)
    at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.access$200(CpsThreadGroup.java:93)
    at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:282)
    at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:270)
    at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$2.call(CpsVmExecutorService.java:66)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:131)
    at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
    at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:59)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)
Finished: FAILURE

I just need only to get sources rom gitlab repository, build these sources and download the result jar-file via aws s3 cp s3://. Can you help me, where i made error ? I am reaing documentation and i am doing everything according to the documentation, but it does not work.

Source: StackOverflow