Unable to solve this Problem: Assertion failed: Texture.Source.GetNumSlices() == 1 || Texture.Source.GetNumSlices() == 6

Summary

Apparently after working on my project and trying to launch a session, i got hit with this error in the cook:

We hit an error while cooking this content
errors.com.epicgames.content-service.cook_failure
CookJobId:c72f4a58-8a37-4c23-8379-ff158c1c538c
An error occurred while communicating with the game servers (failed to cook module 5c9f3406-4c6c-97b1-7e00-f4b54a0e79df (artifact 92b168fa-f119-4fbe-a9b1-7ae77f7f25cf:linux-server) (cookJobId c72f4a58-8a37-4c23-8379-ff158c1c538c) with error code errors.com.epicgames.cookplugin.cookfailure).

LogWindows: Error: appError called: Assertion failed: Texture.Source.GetNumSlices() == 1 || Texture.Source.GetNumSlices() == 6 [File:D:\build++Fortnite\Sync\Engine\Source\Runtime\Engine\Private\TextureDerivedData.cpp] [Line: 1186]

Too many warnings / errors, aborted processing of errors / warnings
LogWindows: Error: appError called: Assertion failed: Texture.Source.GetNumSlices() == 1 || Texture.Source.GetNumSlices() == 6 [File:D:\build++Fortnite\Sync\Engine\Source\Runtime\Engine\Private\TextureDerivedData.cpp] [Line: 1186]

Too many warnings / errors, aborted processing of errors / warnings

This is literally all the information im able to give based on the output log.
I would apprecciate some help in troubleshooting this issue!

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Assets

Steps to Reproduce

Im unable to give steps to reproduce since the problem is NOT linked to any imported/updated files in the project, since trying to delete everything before it couldn’t launch still causes the same error.

Expected Result

The cook should be a success.

Observed Result

The server failed to install the new version of your content! - Along with the error.

Platform(s)

PC

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Additional Notes

I Tried already checking all the files that were added recently, isolated every single suspicious texture that could cause the problem, but still nothing.