try

config.js

@@ -2,7 +2,10 @@ module.exports = {
     port: process.env.PORT || 5252,
     // Add any other configuration variables here
     allowedOrigins: [
+        'http://localhost',
         'http://localhost:5252',
+        'https://localhost',
+        'https://localhost:5252',
         'https://btcforplebs.com',
         'https://www.btcforplebs.com',
         'http://btcforplebs.com',