Cardconnect error

[pradeep-sawant2501]

Installed pachage anilahir/omnipay-cardconnect.
While integrating card_connect gateway and passing merchant_id, username and password.
After passing card object getting to purchase method getting error as :
cURL error 3:
malformed (see https://curl.haxx.se/libcurl/c/libcurl-errors.html)

Suggest me better package for cardconnect (common 3.0)