The previous data field passed to zks_estimateFee to estimate a swap transaction was no longer working in v0.0.1. v0.0.2 was intended to fix that, but inadvertently included an error on the transaction deadline.
v0.0.03, included at the link below, fixes both of these issues and gets the swap function working again for zkSync Era.
~https://cryptostats.community/discover/adapter/QmbgTEeUoef4osMPLzY9zTwMdRoW1nYJR9fKVDp2DRazdM