How to fix the socket error in Mattermost – Troubleshooting

To fix this add the orgin URL to the config file

eg 

"AllowCorsFrom": " your orgin url ",

To find the orgin URL

• Open the browser and open the mattermost URL in the browser
• Press control + shift + i  to open the Developer tool
• Go to network in that option

• Now refresh the page

• Click on it and find the orgin server name -> Paste it to the “AllowCrosFrom” and save 
• Restart the mattermost service if you running it as a service or if you are running it as a Docker container, then restart the container

It will fix the socket issue