Are you using any firewall software that runs in background? If so, there is a possibility that the firewall software may block the game’s communication with the game server. You may check your anti-virus software’s user manual for how to add Capitalism Lab to one of its approved app to prevent it from being blocked by the firewall.
For example, if you are using Avast, you can add Capitalism Lab’s EXE files “CapStart.exe” and “CapMain.exe” into Avast’s exception list to prevent it from blocking the game.