Hi there! Thank you for your interest in this game!
This error shows up for the web version of the game on Chrome and chromium-based browsers because one of their updates was incompatible with Ren'py (the game engine). So unfortunately there is nothing I can personally do to fix this. This issue is affecting almost all web games made on Ren'py.
To play the game now, you can either download it, or play it on Firefox or any non-chromium browser.