I have a simple hook_post_update function which fails with the following error:

[notice] Update started: ssc_custom_post_update_9001

[error] LogicException: Render context is empty, because render() was called outside of a renderRoot() or renderPlain() call. Use renderPlain()/renderRoot() or #lazy_builder/#pre_render instead. in DrupalCoreRenderRenderer->doRender() (line 244 of E:wwwmysschtmlcorelibDrupalCoreRenderRenderer.php). [error] Render context is empty, because render() was called outside of a renderRoot() or renderPlain() call. Use renderPlain()/renderRoot() or #lazy_builder/#pre_render instead. [error] Update failed: ssc_custom_post_update_9001

In ProcessBase.php line 171:

Unable to decode output into JSON: Syntax error

[ERROR] [node] [2022-03-12T04:58:35] LogicException: Render context is empty, because render() was called outside of a renderRoot() or renderPlain() call. Use renderPlain()/renderRoot() or #lazy_builder/#pre_re nder instead. in DrupalCoreRenderRenderer->doRender() (line 244 of E:wwwmysschtmlcorelibDrupalC oreRenderRenderer.php). | uid: 0 | request-uri: http://default/ | refer: | ip: 127.0.0.1 | link:
{ "0": { "ssc_custom": { "9001": { "#abort": { "success": false, "query": "DrupalCoreEntityEntityStorageException: Ren der context is empty, because render() was called outside of a renderRoot() or renderPlain() call. Use re nderPlain()/renderRoot() or #lazy_builder/#pre_render instead. in DrupalCoreEnt
itySqlSqlContentEntityStorage->save() (line 810 of E:wwwmysschtmlcorelibDrupalCoreEntitySqlSqlContentEntityStorage.php)." } } }, "#abort": [ "ssc_custom_post_update_9001" ] }, "drush_batch_process_finished": true }

I have stripped the code down to the bare minimum:

use DrupalCoreEntityEntityStorageInterface; use DrupalCoreEntityEntityTypeManagerInterface; use DrupalnodeNodeInterface;  function ssc_custom_post_update_9001(&$sandbox) {   /** @var DrupalnodeNodeStorageInterface $node_storage */   $node_storage = Drupal::entityTypeManager()->getStorage('node');    // How many entities to processed per batch.   $limit = 5;    $node_ids = $node_storage->getQuery()     ->accessCheck(FALSE)     ->condition('type', 'article')     ->range(0, $limit)     ->execute();   // Load entities.   $nodes = $node_storage->loadMultiple($node_ids);    /** @var DrupalnodeNodeInterface $node */   foreach ($nodes as $node) {     $node->setNewRevision();     $node->save();   }    $sandbox['#finished'] = 1;  } 

If I run the same code directly (not from drush updb) it runs fine. Running from the admin menu "Run updates"; it also fails (so it is not a drush issue).

Commenting out the $node->save() and the error does not occur.