[Papa's Taco Mia] Pre-2014 versions do not progress past the initial loading screen

[InputEvelution]

Describe the bug

Pre-2014 versions of Papa's Taco Mia, before Flipline removed MochiAds from their games, will not progress past the initial loading screen used to decrypt the game, instead landing on a black screen.
https://github.com/user-attachments/assets/0878f09f-6108-4b25-bf78-44474c7a8c7b
The following error appears in the console upon this happening:

Expected behavior

The game should progress to the MochiGames and Flipline Studios logo screens, and then to the game as normal.

Content Location

Earlier versions of Taco Mia can be found via the Wayback Machine: https://web.archive.org/web/20131226000000*/http://i.flipline.com/gamefiles/papastacomia/papastacomia.swf

Affected platform

Desktop app

Operating system

Windows 10

Browser

No response

Additional information

This error does not occur for any of the other encrypted pre-2014 Papa's games in Ruffle (Burgeria, Freezeria, Pancakeria, etc.); They all run normally.
This error also doesn't occur in earlier versions of Ruffle, such as the August version currently used on the Wayback Machine, suggesting a regression was introduced at some point in the past 3 months.