The GO.db manual says to use the AnnotationDbi select method to access the various tables it contains. Whilst this works for the GO.db object itself, the same error occurs for the various other objects:
Error in (function (classes, fdef, mtable) : unable to find an inherited method for function ‘select’ for signature ‘"AnnDbBimap"’
Which suggests they are still using the old method and that select is not supported at all. Is my install wrong, am I doing something wrong?!
Relevant sessionInfo(): R version 4.0.3 (2020-10-10) AnnotationDbi_1.52.0 GO.db version 3.12.1