Merge branch '1.0.x' into prod/1.0.x

src/QueueManager/UWQueueManager.php

@@ -104,6 +104,11 @@ class UWQueueManager {
    * Process queued items.
    */
   public function processQueue(): void {
+    // If there is no vid set. This happens when max depth is set to zero.
+    if ($this->vid === NULL) {
+      return;
+    }
+
     if ($this->queue->numberOfItems() === 0) {
       $this->createQueue();
     }