Macro Enable documents you download from the internet can be harmful to your devices. BitCasterx.com and ChallengeTask.com doesn’t share macro enable templates, but always be cautious for any file that asks you to enable macros. Macro enabled office documents have been a source for malicious exploits since the internet became a buzzword. (As an alternative) an online version of each task template will be available for you to copy and paste the contents into your own document.

Reference:

Microsoft Documentation: Macros from the internet will be blocked by default in Office - Link: here

Microsoft Documentation: Macros in Office files - Link: here