Fix: Internal Server Error Minecraft [Complete Guide]

Minecraft is one of the most famous online multiplayer games it contains a huge player base of gamers that absolutely adore its gameplay. However, in this article, we will be addressing the internal server error on Minecraft that some users have been getting while attempting to connect to a server or sometimes even during gameplay.

internal server error minecraft
Minecraft Internal Server Error

What Causes the Internal Server Error on Minecraft?

After going through some basic troubleshooting guides, we concluded that the following are some of the most prominent reasons behind the occurrence of this issue.

  • Log Files: In some cases, the log files that store the login data for a server might’ve been corrupted due to which it might not have properly registered the persons’ login on the server due to which the internal server error is being triggered on Minecraft.
  • Mods: In some situations, the mods installed on your game might actually be interfering and preventing some important game files from running properly due to which the internal server error is being triggered. It is best to just check which mods are faulty and are hindering your game from working properly by following the methods below.
  • Faulty Plugins: It is also possible that you have installed some plugins on your computer that are faulty and due to that, you are facing issues while logging in to the Minecraft server. Therefore, try removing any faulty plugins to fix the Internal Server Error on Minecraft.
  • Background applications: In some rare occasions, background applications can also prevent Minecraft from being able to properly register with the game servers due to which this issue might be triggered. Therefore, it is also wise to diagnose for any rogue background applications.

Now that you are familiar with most of the reasons behind this particular issue, we will be moving on towards implementing the fixes.

Before you start:

  1. Take the power adapter of your router out of the socket and wait for it to shut down completely.
    Plugging out the adapter to resolve internal server error minecraft
    Plugging out the adapter
  2. After waiting for a couple of minutes, power cycle the router by inserting its power adapters into the socket and wait till it acquires full signals.
  3. Sometimes, this error might occur if the Minecraft servers are under maintenance, If this is the case, then the solution is beyond your control. You can check the server status by visiting the Minecraft server website.

Fixing the Internal Server Error Minecraft:

Solution 1: Delete the UUID folder

  1. Open up the server’s log and note down the “UUID” of the person who encountered the error. This UUID will most probably be written in the first line.
  2. Now log in to your server and navigate to the “Server Files”.
  3. Now proceed to the “World” and choose “Players”.
  4. Here, delete the person’s user name and UUID who has encountered the Internal Server Error.
  5. Now restart your PC and connect to the server to check if you come across minecraft internal server error again.

Note: If you don’t want to permanently delete the player who encountered the error, just put them in “Jail” and after they join the server, simply “Unjail” them.

Solution 2: Delete installed Mods

Method 1:

This error might trigger due to some incompatible mods installed on your computer. If you have several different mods installed on your PC, then it is a hectic task to locate the faulty mod and delete it to resolve the issue. So, the most efficient approach is to disable all the mods and enable them one by one to check which one is the backbone of the error. A method to disable the mods in Minecraft is indexed below:

  1. Login to the Minecraft’s “Control Panel” and stop your server.
  2. From the “File” menu, select “FTP File Access” and enter your FTP password.
    FTP File Access to fix internal server error minecraft
    Choose FTP FIle Access
  3. From the “Server folder” list, click on the “Mods” folder.
    Choose Mods
    Choosing Mods
  4. Now select the mod you want to disable and click on the “Rename” button at the top of the page.
  5. Now add “.disable” at the end of the mod name. (For Example: change “Baubles.jar” to “Baubles.jar.disable”).
    Rename mods to fix internal server error minecraft
    Renaming mods
  6. Now “Apply” the changes and exit your FTP connection.
  7. Restart your server and check whether the minecraft internal server error pops up again.

Solution 3: Delete installed Plugins

  1. Press “Win + R” on the keyboard to open the Run box and search for “%appdata%”.
    Typing in %appdata%
    Typing in %appdata%
  2. Now open the “Minecraft” folder and then double-click on the “Plugins” folder to open it.
  3. Select all the files in the “Plugin” folder and hit the “Delete” key on the keyboard to delete all the installed plugins.
  4. After deleting the plugins, login to your Minecraft account and check if you encounter the internal server error minecraft again while connecting to a server.

Solution 4: Close background applications

  1. Press the “Ctrl + Shift + Esc” keys simultaneously on the keyboard to open the “Task Manager”.
  2. Navigate to the “Processes” tab, select all the unwanted processes that might be bandwidth-intensive, one by one, and click on the “End Task” button.
    Ending background applications to fix internal server error minecraft
    Ending background applications
  3. When the unwanted applications are closed, launch Minecraft on your PC and proceed to connect to a server to check if you encounter this error again.

Solution 5: Edit game’s JSON file

  1. Navigate to the “stats” folder in the game’s server and double-click on the JSON file to open it.
  2. Now scroll down in the file and delete the “stat.killEntity.EntityHorse : 3” entry.
  3. Save the file and launch Minecraft again to check if the internal server error is rectified.

Solution 6: Update Minecraft

  1. Press “Windows key + R” on the keyboard to open the run box and search for “%appdata%”.
    Typing in %appdata%
    Typing in %appdata%
  2. Now locate and double-click on the “.minecraft” folder.
  3. Navigate to the “.version” folder, press “Ctrl + A” from the keyboard, and hit the “Delete” key.
  4. When the deletion process is complete, launch Minecraft to automatically detect the changes and update itself.

Solution 7: Reinstall Minecraft

  1. Press “Windows key + R” from the keyboard to open the run box and search for “appwiz.cpl”.
    Typing "appwiz.cpl"
    Typing “appwiz.cpl”
  2. Now locate Minecraft from the list of Softwares installed on your computer, right-click on it and select “Uninstall”.
    Uninstall Minecraft to get rid of internal server error minecraft
    Uninstalling Minecraft
  3. Now launch a browser and download Minecraft from its official website.
  4. Double-click on the downloaded executable file and follow the on-screen instructions to install the game on your PC.
  5. When the game has been installed successfully, launch it and try to connect to a server and most probably the internal server error minecraft issue would’ve been resolved uptil now.


  1. Press “Ctrl + Shift + Esc” keys on the keyboard to open the task manager and navigate to the “Process” tab.
  2. Here, locate a process related to “JAVA”. If you find that process, right-click on it and set its priority to “High”.
  3. Now press “Windows key + R” on the keyboard to open the run box and search for “%appdata%”.
    Typing in %appdata%
    Typing in %appdata%
  4. Navigate to the “.minecraft” folder and open the “TooManyItems” file with notepad.
  5. In this file, make sure that the “Enable” entry is set to “True”.
  6. Launch Minecraft again and check if the error has been fixed.

If you are still unable to fix this issue, you can contact us for any further assistance.

Alan Adams

Alan is a hardcore tech enthusiast that lives and breathes tech. When he is not indulged in playing the latest video games, he helps users with technical problems that they might run into. Alan is a Computer Science Graduate with a Masters in Data Science.
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