Hi, I occurred the typical issue described in many similar threads on the forum - once launching DJI_Flight Simulator on PC I'm facing  Network Error 008_008 {0000/0263}. It appeared next day when I successfully installed the application logged in and tried a few missions using RC from Mavic Air. However today it returned the Error.
I tried all suggested solutions: uninstalling UE4PrereqSetup_x64 and installing it again - do not help; uninstalled the entire simulator and installed it once more - do not help; upgraded all drivers and Ms.NET Framework - do not help.
Really frustrated
How to fix the issue?
PS - my system configuration is even higher than required by the app

Hello there semenale. I am sorry for the trouble this has caused and thank you for reaching out. Kindly please check the suggestions below:
1. Switch to another internet provider, eg. your 4G on the mobile, and if the download is already completed, it would only cost minor data.
2. If the issue is not fixed, perform the following steps: turn off the Simulator, reinstall the UE4PrereqSetup_x64.exe(default address: C:/Program Files（x86）/DJI Flight Simulator/UE4PrereqSetup_x64.exe).
3. For Windows computer, please install the Microsoft .NET Framework 3.5: https://www.microsoft.com/en-US/download/details.aspx?id=21
4. Restart the computer then launch the Simulator again, and check whether the issue persists.
Thank you.

DJI Stephen Posted at 7-25 20:07
Hello there semenale. I am sorry for the trouble this has caused and thank you for reaching out. Kindly please check the suggestions below:
1. Switch to another internet provider, eg. your 4G on the mobile, and if the download is already completed, it would only cost minor data.
2. If the issue is not fixed, perform the following steps: turn off the Simulator, reinstall the UE4PrereqSetup_x64.exe(default address: C:/Program Files（x86）/DJI Flight Simulator/UE4PrereqSetup_x64.exe).

Hi, thanks for the response! I did steps #1-3, which you advised, a few times, but it didn't help. I mentioned this in my first post. However, today when I launched Windows and Simulator anew everything works. I'm happy! Perhaps step #4 (restarting the computer) was essential in this instruction. Hopefully, FS will work further reliably. Take care!

semenale Posted at 7-25 23:46
Hi, thanks for the response! I did steps #1-3, which you advised, a few times, but it didn't help. I mentioned this in my first post. However, today when I launched Windows and Simulator anew everything works. I'm happy! Perhaps step #4 (restarting the computer) was essential in this instruction. Hopefully, FS will work further reliably. Take care!

Hi there semenale. Thank you for the reply and it is great to know the the issue has been resolved. If you have any other issues or any concerns with DJI. Please feel free to post it here at DJI Forum. We are all here to help and assist you. Thank you.

DJI Stephen Posted at 2021-7-25 20:07
Hello there semenale. I am sorry for the trouble this has caused and thank you for reaching out. Kindly please check the suggestions below:
1. Switch to another internet provider, eg. your 4G on the mobile, and if the download is already completed, it would only cost minor data.
2. If the issue is not fixed, perform the following steps: turn off the Simulator, reinstall the UE4PrereqSetup_x64.exe(default address: C:/Program Files（x86）/DJI Flight Simulator/UE4PrereqSetup_x64.exe).

Thanks the problem was the wifi network, i changed for 4G and is done

djiuser_J2D0dsRARF8L Posted at 3-6 05:14
Thanks the problem was the wifi network, i changed for 4G and is done

Hi there. Thank you for the reply and for giving out these information. It is great to know that the issue has been solved. If you have any other concerns or any inquiries with DJI. Please feel free to post it here at DJI Forum. We are all here to help and assist you. Thank you.

DJI Stephen Posted at 2021-7-25 20:07
Hello there semenale. I am sorry for the trouble this has caused and thank you for reaching out. Kindly please check the suggestions below:
1. Switch to another internet provider, eg. your 4G on the mobile, and if the download is already completed, it would only cost minor data.
2. If the issue is not fixed, perform the following steps: turn off the Simulator, reinstall the UE4PrereqSetup_x64.exe(default address: C:/Program Files（x86）/DJI Flight Simulator/UE4PrereqSetup_x64.exe).

Hey did all the 4 steps you mentioned and still can't go trough the error

Is there any other way to solve this issue?

DJI Stephen Posted at 2021-7-28 00:07
Hi there semenale. Thank you for the reply and it is great to know the the issue has been resolved. If you have any other issues or any concerns with DJI. Please feel free to post it here at DJI Forum. We are all here to help and assist you. Thank you.

hello, I have also made a mistake error 008_{000/0263} I have done all the steps 5-6 times in order, but the error remains

arti.k.k Posted at 8-15 10:25
hello, I have also made a mistake error 008_{000/0263} I have done all the steps 5-6 times in order, but the error remains

Hi, there. We're sorry for the inconvenience. May I confirm if you're still experiencing the error message? If so, please provide us with the model of your computer, operating system, and the error message. I hope to hear from you soon.

DJI Stephen Posted at 2021-7-25 20:07
Hello there semenale. I am sorry for the trouble this has caused and thank you for reaching out. Kindly please check the suggestions below:
1. Switch to another internet provider, eg. your 4G on the mobile, and if the download is already completed, it would only cost minor data.
2. If the issue is not fixed, perform the following steps: turn off the Simulator, reinstall the UE4PrereqSetup_x64.exe(default address: C:/Program Files（x86）/DJI Flight Simulator/UE4PrereqSetup_x64.exe).

I have done this multiple times step by step and the problem is still happening

This problem occurred today. Please advise how to run the simulator.

ksUser Posted at 12-30 10:38
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This problem occurred today. Please advise how to run the simulator.

This morning the DJI simulator suddenly started working. I didn't even restart my computer.
Thank you.