firebase deployエラー

firebase deploy時にエラーが発生します。

Error: Error occurred while parsing your function triggers.

TypeError: Cannot read property 'replace' of undefined
    at Object.<anonymous> (/Users/xxx/Desktop/& ath/and-ath/functions/lib/index.js:7:100)
    at Module._compile (internal/modules/cjs/loader.js:959:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:995:10)
    at Module.load (internal/modules/cjs/loader.js:815:32)
    at Function.Module._load (internal/modules/cjs/loader.js:727:14)
    at Module.require (internal/modules/cjs/loader.js:852:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at /usr/local/lib/node_modules/firebase-tools/lib/triggerParser.js:15:15
    at Object.<anonymous> (/usr/local/lib/node_modules/firebase-tools/lib/triggerParser.js:53:3)
    at Module._compile (internal/modules/cjs/loader.js:959:30)

index.jsの中身は以下です。

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const functions = require("firebase-functions");
const admin = require("firebase-admin");
const mails_1 = require("./mails");
admin.initializeApp({
    credential: admin.credential.cert(JSON.parse(JSON.stringify(functions.config().service_account).replace(/\\n/g, "\n"))),
    databaseURL: functions.config().admin.database_url
});
exports.mail_send = mails_1.mail.send;
//# sourceMappingURL=index.js.mapty

こちら、解決方法はございますでしょうか。。。