ResourcesTroubleshootingWhat to do when a build fails, a preview will not start, an app crashes, or an install is refused.Copy MarkdownBuilding The build failedThe build has been going for a long timeIt says the app is being edited in another session Previews The preview will not startThe preview opens on a blank or red screenThe preview shows an old versionThe QR code does nothingThe in-browser preview is blank Installing an Android build Android will not let me install itInstalling an update failsA change I made has not reached people who installed the app The app itself Maps are blankPush notifications never arriveA permission prompt never appears again after I declinedChanges made offline did not save Editors My editor cannot see MistflowAuthentication failed Still stuck? FAQ Discord FAQCost, ownership, limits, phones, stores, and the questions people ask most.ChangelogProduct updates and release notes.