I am trying to follow this link ddms: 'adb.exe,start-server' failed -- run manually if necessary, Android Studio and it works for me.
you can also try this process
adb kill-server
then
adb start-server
then
adb nodaemon server
output cannot bind 'tcp:5037'
then @Parth Anjaria comment from how to restart ADB manually from Android Studio this link.
This problem's solution varies.