Several route names and page references were corrected after the admin text updates.

Admin, facilitator, and teacher pages were renamed into plural route files such as categories, games, groups, students, and related sidebars were updated to point to the new names. The helper and action routing logic was adjusted to match those filenames.

The public activity v2 view also received follow-up fixes to keep the game flow text and display behavior consistent after the previous copy changes.

Reference: cb7bbfd