Operational Workflow Enhancement

I need assistance with fixing a flow. The primary focus is on sending emails with files using an array. I have the flow working up to the point the files are attached to Send an Email action. I also have a compose prior to the email and the raw output can be copied and pasted into base64.guru and it's the right file. I then go into Send an Email action and add an attachment using the AttachmentArray. The email is sent, is received with the attachments, correct file extensions and size. However, you cannot open them