Light needs to be rebuilt ошибка

I have encountered the same problem but I manage to fix it at the end of the day.

Firstly you have to make sure that the light you selected is functioned

To do this simply right click the light you desire and enter the properties option.

Go to the light > Lighting component > lighting component> Function

Next to the «function» tab you will see a blue button, click it and select light function, that is it!!!

If you have problem with the shadow and light appearance (especially when it disappear when you approach them) you have to build the lighting to fix it.

Usually I build the lighting after I finished my terrain, because after I tested it several times, it appears that you will have to build the lighting again if you add an object. So make sure you finished everything first then build the lighting.

To build the lighting open the build panel which is located at the very top of the program, then select Build all (Might as well build the path as well even though it’s not necessary).

Hope it helps

I do not remember exactly what modification I did on my computer, but when I tried to open the UE4 the following error appeared:

(image taken from the internet)

It is not the first time that this error occurs, but there I went to solve it again (If I remember correctly I deleted the folder with the libraries (.dll) that resolved it the first time, so I had to download it again):

But before, a poetic pause… One day Albert Einstein said: Insanity is to keep doing the same thing and expect different results.

So this time I looked for another place to try to solve this error, :

(VIDEO LINK) => https://www.youtube.com/watch?v=kA4N0x4iG54

In this video the man orders to download a compressed file that contains three folders.

(COMPRESSED FILE) => http://www.mediafire.com/file/at50mz3rkobxe4i/Erro+0xc000007b.rar

You should copy all libraries from the first folder and paste them into the sytem32 folder (if your system is 32-bit) and the system32 and SysWOW64 folders (if your system is 64-bit).

Your pasting must be of the type that replaces existing files:

You will need to give administrator permission for the computer to do this:

There will be an «error», you select the «do this for all current items» box and then click ignore:

Once you click Ignore you will notice that there are numerous selected files. Press the delete key and enter to delete them (again you will have to provide administrator permission):

NOTE => For users of a 64-bit computer, you will have to do this in both folders (system32 and SysWOW64).

In the second folder of the file that the video man made available has the directX installer. I RECOMMEND NOT TO USE, BECAUSE WITH ME IT DID NOT WORK. I even had to reinstall directX.

(OFICIAL LINK OF DIRECTX) => https://support.microsoft.com/pt-br/help/179113/how-to-install-the-latest-version-of-directx

Just install DirectX.

In the third folder of the file that the video man provided, there is another installer (all versions of Visual Studio) that also did not work for me.

(OFICIAL LINK 64-bit) => https://www.microsoft.com/pt-br/download/confirmation.aspx?id=36805

Sorry, I downloaded 32-bit too, but I can not find the link.

Just install all versions of Visual Studio from Microsoft.

That way I killed two birds with one stone.

The lighting build works and the error has been fixed.