Support for older version of Chrome

[bsapwindows]

Hi, I'm using an old version of Chrome (v51), I didn't see any minimum version alert when installing the extension but I can't open the manager's option page. Here's the error message showed in console of config/index.html page.

I know it's too much to ask as almost everyone is using latest version of Chrome now, but could you fix it if it's not too much work? Thanks in advance. 🙏