Error: unable to find an inherited method for function ‘normalize’ for signature ‘object = "phyloseq"’

[Saeedjaanz]

Transform OTU table

ps.sp.trans <- transform_sample_counts(ps.sp, function(x) log10(x))

Im trying to normalize a transformed phyloseq (which I did sucesssfully) object; ps.sp is a Large Phyloseq object in the above line of code.
And for normalization, Im using:

Normalize OTU table

ps.sp.norm <- normalize(ps.sp.trans, method = "CSS")

ERROR:

normalize(ps.sp.trans, method = "CSS")
Error: unable to find an inherited method for function ‘normalize’ for signature ‘object = "phyloseq"’