Blynk app cannot access local server and keep showing connecting

help i create a local server in my pc and when i start it shows :

Blynk Server 0.41.8-SNAPSHOT successfully started.
All server output is stored in folder ‘D:\memoire.\logs’ file.
Your Admin url is
Your Admin login email is
Your Admin password is admin

i used this cmd line java -jar server-0.41.7-java8.jar -dataFolder server_data

but when i try to create a new account in my android phone using
a custom server : ---- 9443
when i click signup it cannot connect and keep showing Reconnectinh to the server …

NB: i have the latest phone app update