The folder does not appear after building mobile web

My assets folder has about 15 games, and it works fine, each folder has its own game, and it works perfectly but I just created a 16th folder in assets, created a new sence and wrote script for the game, I have completed and tested it on the web browser, everything works perfectly. But when building the mobile web, only 15 game folders appear, not the folder I just created. Tell me the reason why?

which version of cocos?

2.4.5 . thank for reply

Have you set the folder to bundle?