Fails to download audio source with valid JSON request

Using with Yomitan and custom URL (JSON) which included the copied link (which I am not allowed to paste here) to get Japanese audio via the Yomichan Forvo Server addon.
When using the hover dictionary, there is a red X by the speaker icon, and only a clicking sound plays, indicating audio from other sources such as Jisho or JapanesePod.
Chrome Browser - enabled
Allow access to file URLs - enabled

any advice is greatly apprecipated!