Added Troubleshooting section

Home.md

@@ -64,6 +64,26 @@ This is most likely because the program uses PySide6, which relies on CPython ex
 
 ---
 
+## Troubleshooting
+
+At this time, there is no direct contact method available.
+However, since this repository is mirrored on [GitLab](https://gitlab.com/CodeByMrFinchum/OptimaLab35), you can report any issues or bugs by opening an **issue** there. I will receive a notification and respond as soon as possible.
+
+### Ubuntu and Derivatives – `qt.qpa.plugin` Error
+
+Users running **Ubuntu** or its derivative distributions (such as Zorin OS, Linux Mint, etc.) may encounter an error with **PySide6 (6.5.0)** related to the **Qt xcb platform plugin**.
+This issue occurs when the required library **`libxcb-cursor0`** (or sometimes **`xcb-cursor0`**) is missing.
+
+To resolve this, install the package using the following command in your terminal:
+
+```bash
+sudo apt install libxcb-cursor0
+```
+
+> **Note:** Depending on your distribution, this package might not appear in the graphical software center, as many of these only display Snap or Flathub applications.
+
+---
+
 ## GUI Preview
 
 The layout remains consistent with **v1.0.0**, with minor improvements applied. The preview reflects **v1.7**.