Compatibility issues of DoubletFinder 2.0.4 with Seurat V4

[zhongguozhiwang]

Hello, may I ask if the new version of DoubletFinder can not be used in Seurat V4? I have an error when using it. Is there a good solution if I do not update Seurat?
Thank you!
`

packageVersion('Seurat')
[1] ‘4.4.0’
packageVersion('DoubletFinder')
[1] ‘2.0.4’

all.list <- lapply(X = all.list, FUN = function(x) {
sweep.res.list <- paramSweep(x, PCs = 1:20, sct = FALSE)
sweep.stats <- summarizeSweep(sweep.res.list, GT = FALSE)
bcmvn <- find.pK(sweep.stats)
pK <- bcmvn$pK[which.max(bcmvn$BCmetric)] %>% as.character() %>% as.numeric()
DoubletRate <- ncol(x)/100000.06
homotypic.prop <- modelHomotypic(x$seurat_clusters)
nExp_poi <- round(DoubletRatenrow(x@meta.data))
nExp_poi.adj <- round(nExp_poi*(1-homotypic.prop))
x <- doubletFinder(x, PCs = 1:20, pN = 0.25, pK = pK, nExp = nExp_poi.adj, reuse.pANN = FALSE, sct = FALSE)
})

Error in seu@assays$RNA$counts : $ operator not defined for this S4 class
`

[Drizzle63]

I find this, you can use it try to solve this problem. remotes::install_github('lzmcboy/DoubletFinder_204_fix')
I have the same version of Seurat and DoubletFinder with you,but I find that :
Error in seu@meta.data : no applicable method for @ applied to an object of class "list"
so I want to know if you would have this problem too