No - the message is merely a response to an attempt to use (I think) Math::BigInt::GMP or (if that fails) Math::BigInt::Pari or (if that fails) Math::BigInt::BitVector. When those libs are unavailable, you get the messages that the OP quoted, and the pure-perl (slow) Math::BigInt is used instead. Nothing there that's going to cause any problems (except for speed of processing).
I re-installed these three libraries and then the login worked :)
How did you know the libraries?
Thanks!