Every time I try to turn on Night Mode at the Turn Off the Lights Options page tab, it crashes. Why is this? This is an issue in the Google Chrome web browser, make sure you use the latest version of this browser. And try to reinstall the Chrome extension again.
If you still can’t modify any settings in the Turn Off the Lights options page, try to disable the Chrome extensions you are using one by one except Turn Off the Lights. And do also a spyware/malware scan on your computer with the program “Spybot Search and Destroy” or “Malwarebytes”. Or if you can use the Google Chrome Cleanup Tool, then try this Google software. That will scan and remove software that may cause problems with Chrome.