No valid combination of account information found

You might have stumbled upon the error below while upgrading the minor commerce version:

I encountered this while upgrading from EPiServer Commerce version 13.32.3 to 13.33.0.

Google gave me this: https://stackoverflow.com/questions/13913589/azure-blob-storage-no-valid-combination-of-account-information-found

So I wondered what does my upgrade have anything to do with Azure Blob Storage? 

Turned out, it has something to do with Azure Blob Storage indeed.

In version 13.33.0, you can use Azure Blob Storage to keep the site's blobs, using this article if you want to do that: https://world.optimizely.com/blogs/ram-kumar-k/dates/2018/3/using-azure-cloud-for-storing-episerver-cms-blobs/

It gave me the hint to find that the upgrade has inserted a new provider section below in my Web.config

<blob defaultProvider="azureblobs">
      <providers>
        <add name="azureblobs" type="EPiServer.Azure.Blobs.AzureBlobProvider,EPiServer.Azure" connectionStringName="EPiServerAzureBlobs" container="mysitemedia"/>
      </providers>
</blob>
<event defaultProvider="azureevents">
      <providers>
        <add name="azureevents" type="EPiServer.Azure.Events.AzureEventProvider,EPiServer.Azure" connectionStringName="EPiServerAzureEvents" topic="MySiteEvents"/>
      </providers>
</event>

Additionally, new connections were added:

<add name="EPiServerAzureBlobs" connectionString="DefaultEndpointsProtocol=https;AccountName=mystorageccount;AccountKey=abcdefghijklmnoabcdefghijklmnoabcdefghijklmno"/>
    <add name="EPiServerAzureEvents" connectionString="Endpoint=sb://myservicebus.servicebus.windows.net/;SharedAccessKeyName=RootManageSharedAccessKey;SharedAccessKey=abcdefghijklmnoabcdefghijklmnoabcdefghijklmno="/>    

Commented out both sections since I am not going to use them yet and my site is back to life.