microg/GmsCore · error · RuntimeException

authUrl is null

Error message

authUrl is null

What it means

WebViewHelper.openWebWithAccount resolves the Play auth token and builds a web-login URL; when the resulting authUrl comes back null, it throws with this message, aborting the web-view billing flow because no authentication URL could be obtained.

Source

Thrown at vending-app/src/main/java/org/microg/vending/billing/ui/WebViewHelper.kt:100

    }

    private fun addLanguageParam(url: String): String {
        val language = Locale.getDefault().language
        return if (language.isNotEmpty()) {
            Uri.parse(url).buildUpon().appendQueryParameter("hl", language).toString()
        } else {
            url
        }
    }

    private fun openWebWithAccount(account: Account, url: String) {
        try {
            val service = "weblogin:continue=" + URLEncoder.encode(url, "utf-8")
            val accountManager: AccountManager = AccountManager.get(activity)
            val future = accountManager.getAuthToken(account, service, null, null, null, null)
            val bundle = future.getResult(20, TimeUnit.SECONDS)
            val authUrl = bundle.getString(AccountManager.KEY_AUTHTOKEN)
                ?: throw RuntimeException("authUrl is null")
            if (authUrl.contains("WILL_NOT_SIGN_IN")) {
                throw RuntimeException("Would not sign in")
            }
            if (Log.isLoggable(TAG, Log.DEBUG)) Log.d(TAG, "Opening $authUrl")
            webView.post {
                if (SDK_INT >= 21) {
                    CookieManager.getInstance().removeAllCookies {
                        if (Log.isLoggable(TAG, Log.DEBUG)) Log.d(TAG, "Cookies removed")
                        loadWebViewUrl(authUrl)
                    }
                } else {
                    CookieManager.getInstance().removeAllCookie()
                    loadWebViewUrl(authUrl)
                }

            }
        } catch (e: Exception) {
            if (Log.isLoggable(TAG, Log.DEBUG)) Log.d(TAG, "Failed to get weblogin auth.", e)

View on GitHub (pinned to 157c9d86ac)

Solutions

1. Verify the account and URL inputs before starting the web-login flow
2. Fall back to an error state in the billing UI when authUrl cannot be built

When it happens

Trigger: Thrown at vending-app/src/main/java/org/microg/vending/billing/ui/WebViewHelper.kt:100 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of microg/GmsCore@157c9d86ac (2026-09-06). Data as JSON: /api/errors/9df8641e716a0812. Report an issue: GitHub.