How do I have multiple UnityWebRequests in one coroutine?

I have a DLC scenario in my mobile app. It's one download button that will retrieve 2 asset bundles from HTTP links. I've set up an IEnumerator that goes through a UnityWebRequest, gets the asset bundle, stores it, and then disposes itself. The coroutine gets to line 77 where the second UWR should start, and I get this error message:

"InvalidOperationException: Cannot get content from an unfinished UnityWebRequest object"

So, what's going on here? I check to see if the UWR's Download Handler is finished and then dispose of both the handler and the UWR itself. So why am I getting an error message saying that there's an unfinished UWR object? I'm missing something here...

Thanks for the help! Here's my code:

 #elif UNITY_IOS || Unity_Editor
         using (UnityWebRequest uwr = UnityWebRequestAssetBundle.GetAssetBundle(myaamiakiAssets))
         {
             Debug.Log("Downloading audio assets.");
             yield return uwr.SendWebRequest();
 
             if (uwr.isNetworkError || uwr.isHttpError)
             {
                 Debug.Log(uwr.error);
                 downloadButton.SetActive(true);
                 downloadingIcon.SetActive(false);
                 yield break;
             }
             else
             {
                 // Get downloaded asset bundle
                 AssetBundle bundle = DownloadHandlerAssetBundle.GetContent(uwr);
                 downloadingIcon.SetActive(true);
                 downloadButton.SetActive(false);
                 if (uwr.downloadHandler.isDone)
                 {
                     Debug.Log("Audio assets downloaded.");
                     bundleStorage.myaamiakiAssets = bundle;
                     uwr.downloadHandler.Dispose();
                     uwr.Dispose();
                 }
             }
         }
         using (UnityWebRequest uwr = UnityWebRequestAssetBundle.GetAssetBundle(myaamiakiScene))
             {
                 Debug.Log("Downloading scene asset.");
                 if (uwr.isNetworkError || uwr.isHttpError)
                 {
                     Debug.Log(uwr.error);
                     downloadButton.SetActive(true);
                     downloadingIcon.SetActive(false);
                     yield break;
                 }
                 else
                 {
                     // Get downloaded asset bundle
                     AssetBundle bundle = DownloadHandlerAssetBundle.GetContent(uwr);
                     downloadingIcon.SetActive(true);
                     downloadButton.SetActive(false);
                     if (uwr.downloadHandler.isDone)
                     {
                         Debug.Log("Scene asset downloaded.");
                         bundleStorage.myaamiakiScene = bundle;
                         StartCoroutine(MyaamiakiLoadAndStore());
                         downloadingIcon.SetActive(false);
                         startButton.SetActive(true);
                         //save asset locations
                         metaSaver.SaveGame();
                         yield break;
                     }
                 }
             }
         
 #endif