Error moving to next stage

[patxiworks]

Thanks for an amazing app. Unfortunately, it broke on moving to a new stage. The error displayed is:

TypeError: Cannot read properties of undefined (reading 'StageStartDate')

The code raising the issue is var activeStageStartDate = Date.parse(matchStages[activeStageMatchNumber].StageStartDate);
Logging activeStageMatchNumber to the console gives 17 which is beyond the index of matchStages.

Any way to solve this, or am I getting it wrong somewhere?

Thanks in advance.