[quote=@rush99999]
<Snipped quote by Guardian Angel Haruki>

This statement keeps bringing my mind back to the pre-game decision most of the party made to sneak into the Witchlight Carnival eight years ago, leading to the loss of the lost things. But I know that can't the cause of the no Inspiration rule. I opted out of that story hook while making Brutrumukk, yet the rule still applies to him.
[/quote]

........You figured it out.

You've actually hit the nail on the head. 
Yes, the lost things cause the inability to gain inspiration until they are found again. 

Because you opted out of that story hook, I had to think of something else for him to achieve inspiration, with the rest of the party. 

(EDIT: Fixed grammar typo)