Published app sign-in page renders blank — id.glideapps.dev/app-login blank in Chrome and Firefox

My published GlideOS app redirects correctly to id.glideapps.dev/app-login but that page renders completely blank in Chrome and Firefox (including incognito). No sign-in form appears at all.

App URL: https://girls-that-roll-with-blanks.glideos.app Access level: Anyone with the link – sign in required

The app builds and deploys successfully. The blank page is on the Glide sign-in screen itself, not the app. A bug report has already been filed via the builder.