Connection Timeout

 

Errors:

Connection Timed Out
Curl Error 28/50

Most of these errors mean that your network is having difficulty sending a ping or establishing a stable connection to the server. When you launch FiveM, the client (your FiveM app), your computer, and your network work together to send data—essentially 1s and 0s, known as binary—to a server. This is how communication happens between your game and the server. If your network is unstable, congested, or the server is unresponsive, the connection attempt may fail. This failure can happen during the initial handshake or in the form of high ping (measured in milliseconds), which can cause timeouts and disconnections. In this case, here's what you should try:

1) Reboot your router by unplugging the power cable, waiting 10 seconds, and plugging it back in.
    This will also help clear up any duplicate MAC addresses that the router may have to re-establish the connection to the www (world wide web).

2) Clear and flush DNS. 
    Sometimes, rebooting your router doesn't clear up duplicate MAC addresses, so you would need to flush your DNS. Flushing DNS refers to clearing the stored DNS (Domain Name System) cache on your computer or device. This cache stores previously resolved website addresses (IP addresses) to speed up subsequent visits. Clearing it forces your device to fetch the most current information from the DNS servers. 

Workflow:
Command Prompt as Administrator
Search for CMD by clicking on your Windows start button

Type the following commands and then press enter on your keyboard for each
First command: ipconfig /flushdns
Second command: ipconfig /release
Third command: ipconfig /renew

Now reboot your computer.