I have the following code that unloads the pipeline script from SVN and runs the function
checkout([
$class: 'SubversionSCM',
locations: [[
credentialsId: env.CREDENTIAL_ID_SVN,
depthOption: 'infinity',
ignoreExternalsOption: true,
local: '.',
remote: env.TEMPLATE_PATH
]],
workspaceUpdater: [$class: 'UpdateUpdater']])

def builder = load 'runner_with_group_and_restart.groovy'
builder.run_jobs(jobs_map)

sometimes the assembly begins with the following exception:
org.jenkinsci.plugins.scriptsecurity.scripts.UnapprovedUsageException: script not yet approved for use
at org.jenkinsci.plugins.scriptsecurity.scripts.ScriptApproval.using(ScriptApproval.java:459)
at org.jenkinsci.plugins.workflow.cps.CpsFlowDefinition.create(CpsFlowDefinition.java:110)
at org.jenkinsci.plugins.workflow.cps.CpsFlowDefinition.create(CpsFlowDefinition.java:59)
at org.jenkinsci.plugins.workflow.job.WorkflowRun.run(WorkflowRun.java:232)
at hudson.model.ResourceController.execute(ResourceController.java:98)
at hudson.model.Executor.run(Executor.java:404)
Finished: FAILURE

Although scripts do not have changed and after a while everything starts to run