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Error when logging in to multiplayer

Ruslan Drake


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Here i want to drop some possible solutions:


- Re-install Truckersmp Launcher.

- Re-install .Net Framework (4.8).

- Reboot your PC.

- Run TruckersMP launcher as administrator.

- Verify have the latest Windows Updates.

 -Open CMD as administrator from the search engine. Or press "Windows+R" to open the "Run" box. Type “cmd” into the box and then press Ctrl+Shift+Enter (to open it as administrator).

 -Execute these codes:

ipconfig /flushdns

nbtstat –r

netsh int ip reset

netsh winsock reset

- Restart the pc

If you cannot execute the codes, verify that you have opened CMD as administrator, and antivirus does not interfere.


- Try opening the specific ports: 42860, 49200, 42890. Also configure Google DNS, and
- Make sure Windows Firewall is not blocking the connection. Start by opening Windows Firewall and Restore Defaults.

- If your router has a firewall, you should also disable it.

-If you do it and nothing happens, contact your ISP asking to enable the ports.


If nothing works, try:

- Open any VPN program and try connect.(ex: UltraSurf or ProtonVPN)
- Turn off firewall and anti-vuris programs.

- Disable your router firewall (if it has one).
- Try clearing your DNS cache, follow this link for the guide https://documentation.cpanel.net/display/CKB/How+To+Clear+Your+DNS+Cache .

Open TruckersMP as administrator,

Install the available updates (only the first run with VPN), wait for it to finish and the Start button will appear,

Finish your VPN program.


This tool maybe helpful.

use it by checking the options shown below in this image.


If you need help, you can request it in your main language here

Regards ^_^

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Try this


Open any VPN program and open the launcher with VPN program,

Download CCleaner and delete useless folder on your computer,

Try turning your router off for 1 minute or 5 minute and then turning it back on,

Try clearing your DNS cache, follow this link for the guide https://documentation.cpanel.net/display/CKB/How+To+Clear+Your+DNS+Cache

Try it Launch the TMP launcher as administrator.

Turn off firewall and anti-virus programs on your computer.


Try delete TruckersMP Files on your computer:

Press the Windows Key + R (Win+R) on your keyboard

Enter "%programdata%" and press Enter (without the quotes)

Find the folder "TruckersMP" and delete that folder.

Navigate to C:\Program Files\ and delete the folder named "TruckersMP Launcher"

Go to our website and re-download and install the Launcher with admin privileges https://truckersmp.com/download/

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Hi there,

Try these:

You should try to run the launcher as an administrator by right-clicking it and launch it as admin. Also, make sure that the process eurotrucks2.exe is not running.

If core_ets2mp.dll is not working for whatever reason you can get the above error; 
First, check if ETS2 process is running. If so end this and try again. 
How to fix - delete core_ets2mp.dll, reopen launcher and redownload file 
TruckersMP file path: C:\ProgramData\TruckersMP.



1.Press the Windows key and R (Win+r) on your keyboard

2.Enter "regedit" and press enter (without the quotes)

3.Navigate to "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa\FipsAlgorithmPolicy"

4.Click "File"

5.Click "Export"

6.Save the file somewhere safe (eg. on your desktop) as a backup

7.Once saved, double click on "Enabled"

8.Set "Value data" to "0" (without the quotes)

9.Press OK

10.Close Registry editor and reboot


Also try this:

1. Reset your network adapator


This page will guide you through what you need to do and explains for different Windows operating systems as you scroll down.




You type 


·         netsh int ip reset reset.txt

·         netsh winsock reset

·         netsh advfirewall reset

In to a DOS window (Comand Prompt).


Clearing the ARP Cache https://techjourney.net/clear-delete-and-refresh-arp-cache-entry/

Resetting your network adapter http://www.home-network-help.com/netsh-winsock.html

Clearing your DNS Cache https://documentation.cpanel.net/display/CKB/How+To+Clear+Your+DNS+Cache

Changing DNS to Google's Public DNS, https://www.techworm.net/2016/08/change-default-dns-google-dns-fast-internet-speeds.html


You can also try resetting the Winsock Catalog


step 1: click on windows search program and type "cmd" enter

step 2: once you're in, type "netsh winsock reset catalog" enter

step 3: type "netsh int ip reset.log hit" enter

step 4: restart your computer






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Hello there! :)


Your topic has been inactive for 3 days since the last reply.

Because of inactivity, I will have to move this topic to Inactive Topics.

If you still have any questions about this, feel free to DM me or our Support Team members, then we will open this Topic again.

Thanks to everyone for trying to help!

Kind regards
TruckersMP Support

//Locked and moved to Inactive Topics


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Hello there! :)
I am going to move this topic to the Unsolved Section ,because it has been inactive for another 7 days.
Do not hesitate to contact us again by creating another topic or a support ticket!


Have a nice day!


Kind regards


TruckersMP Support


//Moved to Unsolved


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