I keep getting this IS-MF01 error when installing the update

I keep getting this IS-MF01 error when installing the update. How do i fix this its killing my project team?

Hey Fulgear,

I’m sorry that you are having an issue with the Epic Games Launcher. In order for us to offer the best support, we have recently modified the process for how Epic Games can help troubleshoot your Launcher issue. Please visit http://help.epicgames.com/ for technical support, here you can find information and solutions for common issues, as well as a contact form if you still need additional assistance. To access the contact form, please use the “Email Us” button under the “Contact Us” section.


I checked there before posting here and nothing comes up for this issue. what is IS-MF01 anyway

Please use the Email Us button under the Contact Us section on the help site to get more information about your issue.

Have a great day

Hi, Can you please answer this in the public question here so the rest of us having the same problem can see the solution. Thanks.


We have recently changed our process for assisting with Launcher issues. Please refer to http://help.epicgames.com/ for additional support, and if you are unable to find assistance on your issue, ensure to use the Contact Us Email Form that is available on the side of the page to get in touch with someone who can assist you further with Launcher support.

Ok, well there was no info from there - and the last couple of times I’ve emailed support I have not had a reply.

I’ll post my solution to this in case others want to fix it. All I had to do in the end was reset my machine.

I was also getting the error because the LEExtendedScript plugin had 2 entries in my .uproject - I removed the LEExtScript reference and was then able to update the plugin and remove any error messages.

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