Has anyone else ever had this error "ERROR: assertion failed"

[oh-yes-0-fps]

"Loading Texture2D WeaponCell_Sprites from package /Game/uiresources/_shared/assets/inventory_components/WeaponCell_Sprites.uasset
BoolProperty: unknown UTexture2D bPremultiplyAlpha
******** Loading object Texture2D'WeaponCell_Sprites.WeaponCell_Sprites' ********
*** ERROR: assertion failed: Ar.Tell() == SkipOffset

UTexture2D::Serialize4 <- UTexture2D::Serialize <- LoadObject: Texture2D'WeaponCell_Sprites.WeaponCell_Sprites', pos=C4864, ver=516/0 (unversioned), game=ue4.20 <- UObject::EndLoad <- LoadWholePackage: /Game/uiresources/_shared/assets/inventory_components/WeaponCell_Sprites.uasset <- CUmodelApp::ShowPackageUI <- Main: umodel_build=1587" I know the file is a png in a uasset and textures work fine. its just this