# Known issues

## 1. NETWORK PROTOCOL ERROR

Some players may encounter a **“Connection Lost - Network Protocol Error”** when trying to join the server. This issue is typically caused by an outdated or corrupted client installation of the modpack.

<figure><img src="https://2839478450-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FPjsNP2PKm5CTKEnQKXn4%2Fuploads%2FEVS6xGJYMwbWHRo26IFq%2Fimage.png?alt=media&#x26;token=2400055e-7393-4f09-a696-6916dec68041" alt=""><figcaption></figcaption></figure>

This error usually happens when:

* Your local modpack files are not properly installed
* Some mods are missing or mismatched
* The pack version does not match the server

{% hint style="success" %}

#### Solution: reinstall the modpack installation

#### <img src="https://2839478450-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FPjsNP2PKm5CTKEnQKXn4%2Fuploads%2Fhm3uABea6HMI1NiWw2Gq%2Fimage.png?alt=media&#x26;token=822f4376-9911-46f4-a98e-0ddaa199fdfc" alt="" data-size="line"> Option 1: Modrinth (Recommended)

1. Delete your current installation of the modpack, you may want to save your map files.
2. Download the latest version from the official page:\
   👉 <https://modrinth.com/server/cobblemon-cobbletwo>
3. Install the pack again
4. Launch the game and reconnect<br>

#### <img src="https://2839478450-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FPjsNP2PKm5CTKEnQKXn4%2Fuploads%2FXdzViJZkJrc4Zi9T8K6m%2Fimage.png?alt=media&#x26;token=2e131f3e-a677-4432-953a-c44ff989e72e" alt="" data-size="line"> Option 2: CurseForge

1. Delete your current installation of the modpack, you may want to save your map files.
2. Download the latest version from the official page:\
   👉 [https://www.curseforge.com/minecraft/modpacks/cobbletwo](https://www.curseforge.com/minecraft/modpacks/cobbletwo/files/7566361)
3. Install the pack again
4. Launch the game and reconnect
   {% endhint %}