Fix Umamusume Pretty Derby Error Code 501/100/102 There Was A Connection Error On PC
13How To Fix Umamusume Pretty Derby Error Code 501/100/102 There Was A Connection Error On PC
Step 1) Restart Steam, restart PC
Step 2) Rename Umamusume folder in C:\Users\Username\AppData\LocalLow\Cygames, create a backup first (You will lose all the game progress), The game may not work if you've had the JP version (aka DMM) installed on your computer, uninstall DMM also go into the launcher menu at the bottom right corner and repair game data.
Step 3) Run the game from the game installation folder, Run the game as an administrator, try compatibility mode, disable full screen optimization
Step 4) If you are using any third-party antivirus like Comodo, Avast, AVG, McAfee, Norton, bit defender, then allow the game exe to your antivirus program. Windows Security users allow the game exe file to controlled folder access and firewall, If using ESET Security, add the game folder to HIPS exclusion rule. It's under HIPS/Deep Behavorial Inspection/Exclusions, exclude it in the HIPS module, if you are using Cloudflare WARP, turn it off
Step 5) Turn on/off VPN, try different network, use mobile hotspot, switch to ethernet connection
Step 6) Run these commands
ipconfig /flushdns
ipconfig /release
ipconfig /renew
netsh winsock reset
netsh int ip reset
Step 7) Verify the game files