8 Best Methods on How to Fix Lunar Client Not Logging in?


Lunar Client is a famous mod pack for Minecraft that adds new features and changes the game. But people who use Lunar Client may sometimes have trouble getting in.

This post will show you step-by-step how to fix problems with the Lunar Client not logging in, so you can get back to playing Minecraft without any trouble.

How to Fix Lunar Client Not Logging In?

Lunar Client is a useful tool for people who play Minecraft, but it can be annoying if you can’t get in. If you can’t get into Lunar Client, don’t worry. We’ll show you how to fix the trouble and get back in the game.

Method 1: Apply Some Preliminary Checks

  • Check these things first:
  • Relaunch Lunar Client after stopping it.
  • Close any other apps that might get in the way while Lunar Client is running.
  • Make sure that your device is connected to the internet and that the link to the network is stable.

Method 2: Run Lunar Client as an Administrator

You might get the mistake being talked about if Lunar Client can’t get to some system files. Run the client as an administrator to make sure that the limited access is not the problem. By doing this, Lunar Client will be able to use files or resources that it wouldn’t be able to use otherwise.

  • To start Lunar Client as an administrator, do the following:
  • Go to where Lunar Client is being kept.
  • Find the file that can be used to start up the client.

how to fix lunar client not logging in

  • Right-click the Lunar Client EXE file and choose “Run as administrator” from the menu that pops up.

If the problem goes away when Lunar Client is run as an administrator, this means that the operating system’s boundaries are to blame. So, you should make sure that the app always runs as an executive.

Method 3: Delete Lunar Client’s Cache Folders

Like most other game apps, Lunar Client stores some game information in its cache files. This makes it easier for the client to get the information it needs from these places faster, which helps its performance.

But sometimes the piled-up cache gets in the way of how the client works, causing problems that weren’t expected. To make sure that cache isn’t causing the error in question, you should remove all cache folders. To do that, you need to:

  • Go to the place below:
  • Find the folder with the name “lunar client” and open it.

how to fix lunar client not logging in

  • Here, you have to delete the Cache, Code Cache, and GPUCache files.
  • You can delete files by right-clicking on them and then pressing the Delete key.

Method 4: Update Lunar Client

Older versions of Lunar Client might not work well with newer versions, which can make it hard to log in. Check to see if you need to make any changes, and if you do, do so. When a new version of Lunar Client comes out, it generally tells you to update, but you can also check for changes in the client settings.

Method 5: Clear Lunar Client Cache

Clearing the Lunar Client cache can fix many problems with getting in. Do these things to clear the cache:

  • Close Lunar Client completely.
  • Press the Windows key and the letter R to open the Run box.
  • Without the quotes, type “%appdata%” and press the Enter key.
  • Find the folder called “.lunarclient” and get rid of it.
  • Try to log in again after you’ve restarted Lunar Client.

Method 6: Change the Allocated Memory in Lunar Client’s Settings

Users of Lunar Client can choose how much memory the client can use. It helps people get the most out of their system resources and puts less stress on their tools.

Even though it’s great to have so much freedom, don’t be cheap when you give out a memory. You will probably get the mistake we’re talking about if you set up the client with too little memory, which isn’t enough to meet the client’s needs.

Follow these steps to change how much memory Lunar Client uses:

  • Launch Lunar Client.
  • Click the top button that says “Settings.”
  • Move the button under Allocated Memory to change how much memory is being used.

Method 7: Delete the Old Renderer Log File

The error message also says that Java did not start and that a report could not be sent. If the old processor log file has a problem, Lunar Client may not send the error report. This file has information about how the game is set up and about mistakes that have already been found.

Some Reddit users say that the problem being talked about can be fixed by getting rid of this file. So, if none of the fixes worked, you should remove the renderer. old file from the Logs folder. To do that, you need to:

  • Launch Lunar Client.
  • Go to the main page and click “About.”

how to fix lunar client not logging in

  • Click on Logs under Folders. When you click on this, you will go to the Logs folder.
  • Right-click on the Renderer. old file, then click the Delete button.

Method 8: Contact Lunar Client Support

If you’ve tried all the changes and still can’t log in to Lunar Client, you should contact Lunar Client support for more help. Through their support ways, you can tell them about your problem and get help fixing it.


Login problems with the Lunar Client can be annoying, but if you know what to do, you can fix them and get back to playing Minecraft. By following the steps in this guide, you should be able to easily fix most login problems and get Lunar Client back up and running. To read more content like this, visit https://www.trendblog.net.

Frequently Asked Questions (FAQ)

Even though I’ve tried everything, I still can’t sign in. What do I need to do?

If you’ve tried everything in this guide to fix a problem but nothing has worked, you should contact Lunar Client support to get personalized help. They know how to deal with user problems and can help you fix any login problems that keep coming up.

Can I use Lunar Client if I’m not linked to the internet?

No, Lunar Client will not work if you are not connected to the internet. Before you try to log in, make sure that your internet connection is stable and working well.

Will I lose all of my choices and settings if I restart Lunar Client?

Yes, if you restart Lunar Client, you will lose all of your choices and settings. Make sure to write down any changes or keybindings you’ve made so you can set them up again after you reboot.

Can Lunar Client be used on systems besides Windows?

Yes, you can use Lunar Client on Windows, macOS, and Linux. Make sure to get the version of Lunar Client from the official page that works with your machine.

Can I use Lunar Client with other mods or tools for Minecraft?

Lunar Client does work well with most mods and tools. But there may be times when people don’t agree. If you can’t log in, try turning off other mods or plugins for a short while to see if there are any problems.

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