Danke, ich glaube ich habe den Fehler gefunden:
@MWisotzki kannst du den folgenden Patch ausprobiert:
diff --git a/plugins/Diagnostics/Diagnostic/CronArchivingLastRunCheck.php b/plugins/Diagnostics/Diagnostic/CronArchivingLastRunCheck.php
index 7ba4151b27..7ce15e6350 100644
--- a/plugins/Diagnostics/Diagnostic/CronArchivingLastRunCheck.php
+++ b/plugins/Diagnostics/Diagnostic/CronArchivingLastRunCheck.php
@@ -58,7 +58,8 @@ public function execute()
$lastRunTime = (int)Option::get(CronArchive::OPTION_ARCHIVING_FINISHED_TS);
if (empty($lastRunTime)) {
$comment = $this->translator->translate('Diagnostics_CronArchivingHasNotRun')
- . '<br/><br/>' . $this->translator->translate('Diagnostics_CronArchivingRunDetails', [$coreArchiveShort, $mailto, $commandToRerun]);;
+ . '<br/><br/>' . $this->translator->translate('Diagnostics_CronArchivingRunDetails',
+ [$coreArchiveShort, $mailto, $commandToRerun, '<a href="https://matomo.org/docs/setup-auto-archiving/" target="_blank" rel="noreferrer noopener">', '</a>']);;
return [DiagnosticResult::singleResult($label, DiagnosticResult::STATUS_ERROR, $comment)];
}