Some audio transcription services can only be run online, some can only be run locally and some can be run either way.
If you are receiving this alert, it means that the audio transcription service you selected is one which only works online, but you are trying to run your experiment locally, or it is not supported at all.
>2021.2.0
To silence this alert, choose a transcription service which can be run online, such as the built-in transcriber.