error for args when one argument specified

[jamiemkass]

I am having trouble specifying one args argument for MaxEnt(). This works:
predicts::MaxEnt(envs, data, args = c("-l", "-P"))
But this does not:
predicts::MaxEnt(envs, data, args = c("-P"))
Nor does this:
predicts::MaxEnt(envs, data, args = "-P")
The error I get is Error in strsplit(nodata, "=")[[1]] : subscript out of bounds.

I think this should be a quick fix, but not sure how to fix it myself. Thanks.