I tried to use topGO by R 4.0.0 according to the manual below, and I encountered the error below. So could anyone give me suggestions on this error?

http://bioconductor.org/packages/release/bioc/html/topGO.html

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# R Code
sampleGOdata <- new("topGOdata",
description = "Simple session", ontology = "BP",
allGenes = geneList, geneSel = topDiffGenes, nodeSize = 5,
annot = annFUN.db, affyLib = affyLib)

==>

# error message
Building most specific GOs .....
              ( 1647 GO terms found. )

Build GO DAG topology ..........
if (node == GENE.ONTO.ROOT) return(2) error....

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It looks like there is an issue with a dependency. See the following thread:

https://support.bioconductor.org/p/130785/