What causes an invalid URL error?

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• Why do I get an 'invalid url' error message when being redirected from WHMCS to PayFast?

  This is due to one of two reasons: you are testing from a non internet accessible machine (eg. a local development machine) or you have not setup your URLs in WHMCS correctly. Non internet accessible machine The module will only perform as expected ...

• Why do I get an 'invalid url' error message when being redirected from Magento to PayFast?

  This is due to testing from a non internet accessible machine (e.g. a local development machine). Non internet accessible machine The module will only perform as expected if you are testing from an internet accessible machine ...

• What causes the error "The supplied variables are not according to specification"?

  This error is thrown if any of the POSTed values are incorrect, for instance, if the merchant_id or merchant_key is incorrect (possibly due to using a sandbox credentials on the live site), the following error will be thrown ‘The supplied variables ...

• Why am I getting a 'currency format invalid' error?

  PayFast only processes transactions in ZAR and does not provide a currency conversion service. This means the base currency of your store and product prices will need to be set to ZAR for us to be able to process the transaction. However, you may ...

• What causes the ITN security check errors?

  Invalid signature This would be caused by the incorrect use of the passphrase, or the incorrect order of variables in the string that is MD5 hashed to generate the signature. Although this signature is generated in the same way as the signature on ...