Experiencing a boot loop after updating Magisk on your Samsung S8 running Android 9 can be frustrating. It sounds like the recent update might be the culprit. While I can't provide specific technical fixes, here are some general troubleshooting steps you can try:

1. **Safe Mode:** Try booting your phone into Safe Mode. This disables all third-party apps, helping to determine if a recently installed app is causing the conflict.
2. **Recovery Mode:** Enter your phone's recovery mode (guide specific to your model available online) and attempt a **wipe cache partition**. This can often resolve software glitches.
3. **Reinstall Magisk:** Carefully remove Magisk and try reinstalling a previous stable version. This might temporarily resolve the issue while you investigate further.

**Important Considerations:**
- **Backups:** Before proceeding, back up your important data as these troubleshooting steps could result in data loss.
- **PC Connection:** While a PC can be helpful, it's unlikely to directly fix a boot loop. You'll need specialized software like ODIN to flash firmware or modify system partitions, which requires advanced knowledge and caution.

**Seeking Further Help:**
- **Magisk Forums:** Reach out to the Magisk developer community on forums or their official website for specific advice on this issue. Share your device model, Android version, and Magisk version details.
- **Tech Support:** If you're uncomfortable with advanced troubleshooting, consider contacting technical support for your Samsung device or a qualified professional. They can offer personalized assistance and potential solutions.

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