1. network problem: when a user sends a request to the server, the server can't receive the request due to network problems, so that steam can't change the personalized signature and display "unable to connect to the steam market". In fact, the personalized signature has been changed successfully, and other users can't view it.
2. Check the network connection: Make sure your network connection is stable, and try to restart the router or change the network environment to see if it can solve the problem.