Experiment failed towards the end of the run

URL of experiment: Pavlovia

Description of the problem:

Hi,
My experiment is around 65 mins long. I have kept save incomplete results in off mode to avoide uncessary usage of credits. Sometimes it so happens that a person has just opened the link to see how it works and does the experiment some other time by clicking the link again. This way a credit is consumed unnecesarily.
One of my participants did it for 63 mins and all of a sudden he receives a message saying experiment failed. (screenshot attached).
It is really painful when a person does experiment for so long and at the end no data is saved.

I request to have some option of saving the data locally so that in such situations we can access the data.

I will be highly obliged to get help in this.

Thanks and Regards
Aparna