How can I change the closing words of error messages?

Hi,

My experiment generally runs smoothly, but occasionally a participant will get an error at the end saying that the data failed to upload. The message always end with “Try to run the experiment again. If the error persists, contact the experiment designer.”
How can I change this closing line?
The participants work hard to complete this experiment and I don’t want them to see a message at the end telling them to do it over again. I would rather the message just tell them to contact the experiment designer.

Thanks