once more posting it for plugin author:
look for document.createElement(“audio”)
Although we test our third-party integrations in various ways, we had unfortunately not noticed this circumstance primarily because this behavior occurred only with a Russian IP address.
Even though it was not a virus (just a condition that played an MP3 for Russian visitors) we take such usability intrusions very seriously.
For this reason, we have reacted directly and replaced the SweetAlert integration with our own implementation in our latest update from today (version 2.1.1).
Please try to download and install the plugin again in the latest version. Then everything should work as usual even with a Russian IP address.
Sorry for the inconvenience and thanks to all involved for the help.