LG V20 F800K has an error with LGUP Patched

[habaka]

I am using LG V20 F800K, Android Nougat, rooted with DirtySanta. I am following this guide to root on Android Oreo.
However, when I used LGUP Patched here, I encountered the error "DLL for F800K10e is invalid. Please, install valid DLL package (*. msi). for the model." (see attached image).
Please show me how to fix this error?
Also, @xcl0udx, I want to ask: At step 4, when connecting my phone to the computer, does my phone need to turn off and go to Download Mode? Or still turn on, in the main screen?
Thank you very much.

 

[awaisagha]

I am using LG V20 F800K, Android Nougat, rooted with DirtySanta. I am following this guide to root on Android Oreo.
However, when I used LGUP Patched here, I encountered the error "DLL for F800K10e is invalid. Please, install valid DLL package (*. msi). for the model." (see attached image).
Please show me how to fix this error?
Also, @xcl0udx, I want to ask: At step 4, when connecting my phone to the computer, does my phone need to turn off and go to Download Mode? Or still turn on, in the main screen?
Thank you very much.

I am trying to downgrade from pie to nougat. The phone has to be in download mode (volume up + usb plug in) but i am again getting the DLL error.

 

[habaka]

I am trying to downgrade from pie to nougat. The phone has to be in download mode (volume up + usb plug in) but i am again getting the DLL error.

I have also encountered this error, the way to fix it is to carefully examine the USB cable and use LGUP Dual Mode (can be found on Google).

 

[awaisagha]

Dual model lg up doesn't give this error?

 

[awaisagha]

I have also encountered this error, the way to fix it is to carefully examine the USB cable and use LGUP Dual Mode (can be found on Google).

Hi
Thanks a ton for saving me from the mental pain, I was in. I also have the F800K as yours and I had upgraded to pie but it was torture to the phone. When newly installed, it was smooth on phone but had a noticeable lag but after few months of use and plenty of upgrades (play store services, apps & other stuff) it had become very painful to use and not to mention the horrible battery life due to OS using a lot of resources. Previously I had an even worse experience with oreo and pie was a bit better than oreo but I wanted to come back to nougat so direly.
The normal way of using LG UP (with & without uppercut) didn't work. I used the LG UP dual-mode as you mentioned and it worked. I did a step by step downgrade, from pie to oreo and then to nougat. Everything worked fine and now I have a perfectly smooth phone. Thanks to you.