First off, try forcing your IPv6 DNS servers, or disabling IPv6. You can do this by following the process on this site: https://support.streamlabs.com/hc/en-us/articles/115004232954-How-to-solve-IPv6-issues
If you're still having issues, try these steps:
- Try disabling any firewalls you have on your computer.
- Ensure your internet connection is stable.
- Try using an ethernet cable instead of Wifi, if you're using Wifi.
- Configure your connection to use a different public DNS server by following the instructions here: https://1.1.1.1/dns/
- Renew your IP address, either by powering your router off and on again or following the steps here: https://www.tp-link.com/us/support/faq/840/
- Disable any proxy settings. You can find out how to do this here: https://eu.battle.net/support/en/article/23664
- Finally, you can try using Cloudflare's Warp tool that you can install here. We've seen users have success using it, so make sure to install and enable it before opening up VRChat.
If you use Vive Trackers, please note that the USB receivers they use can interfere with WiFi connections. You may see an improvement in network performance if you position them further away from your PC.
Also, make sure you aren't filtering VRChat with any software or hardware DNS filters. VPNs can sometimes apply DNS filtering, and we occasionally see issues when users have DNS filtering devices on their network (like a Pi-Hole).