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App cannot connect to RPi local server

hi
I setup the local server on my Rpi2 …
" Blynk server 0.23.0 successfully started"
I go to Blynk app => Server setting =>custom and writ server
RPi ip 192.168.1.6 and port 9443 .
And write admin email and password …
but app don’t connect to RPi local server…
Please help me…