The show hasn't run since Disney World reopened in July.
Theme park news: Biden coming to Hall of Presidents / Disney exec pay restored amid mass layoffs / Dorney Park vaccines
Disney did not say how long the Hall of Presidents refurbishment would last.
The most recent inspection came after Universal saw large crowds over the holidays.
Loews Hotels said it was canceling the event, citing the mob attack on the U.S. Capitol.
Invites were sent days after Universal's parent company cut off political donations to Hawley and others who voted to block certification.
Knott's will now extend passes into 2022 for each day the park remains closed.
All passholders will receive prorated refunds and still get AP discounts until a new program is unveiled.
2021 will see the opening of a brand new Legoland park as well as the world's fastest multi-launch coaster.
The event will see the return of the Mardi Gras Tribute Store, but larger concerts and parades will not be held thanks to COVID-19.