write UDP: Can't assign requested address (code=49)
This error indicates an issue with the network adapters on your system.
The easiest fix is to do a reboot, you should be able to connect after that. If you prefer not to reboot and have some skills with the terminal:
Step 1. Open Applications > Utilities, then select Terminal.
Step 2. Type in the following commands:
sudo ifconfig en1 down
sudo route flush
sudo ifconfig en1 up
You would have to type in your admin password as well after that.
Please make sure to replace en1 with your actual Internet interface. By default you have:
en0: ethernet (wired) interface
en1: wlan (wireless) interface
To find out which interface is your Internet interface, you can use the following command in the Terminal: sudo ifconfig