Please help : We failed and could not save the Paypal Signature API data and always appear Disable, could not save to enable. Our website is only given instructions set: Username API: Password API: Signature API: display an error message if the save will appear in the billing settings paypal adminpanel our website: --------------------- " Gateway login failed. Please double check your connection information. The gateway has been disabled. The message was: [0] Invalid HTTP response version: 2 " ---------------------- We ask for your help and guidance Thank you
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