Disable Yii routing on particular subfolder

I was given a task to temporary move website B under the subfolder in website A (which runs by Yii 1.1). Can’t seem to find a way how to disable A’s routing for particular folder name. E.g. I need it side B to run under website-a.com/website-b.

When I go website-a.com/website-b - correct root page of B site is shown.

But when I go to website-a.com/website-b/some-other-page yii tries to handle this request and gives me 404.

BTW: on local env run on win - all good. On prod (run on linux) - I get 404 error.

Any advise?