PHP ISDK - legacy key sunsetting - help needed

Hi,

My application connects with keap by using PHP ISDK, and the new github does not provide support with the PHP ISDK code (xml-rpc - Keap Developer Portal), there is no isdk.php file in the new release.

Through customer support they told me to change the legacy key with SAK key in isdk.php file and in conn.cfg.php file and to change https://yourapplicationid.infusionsoft.com/crm/xmlrpc/v1 to https://api.infusionsoft.com/crm/xmlrpc/v1

I have made these changes but still Im geeting fatel error

https://kayadevelopmentserver.com/kayaIS/index.php

Fatal error : Uncaught iSDKException: ERROR: 5 - Didn’t receive 200 OK from remote server. (HTTP/2 401 ) in /home/kayadeve/public_html/kayaIS/isdk.php:88 Stack trace: #0 /home/kayadeve/public_html/kayaIS/index.php(7): iSDK->cfgCon(‘ISCON’) #1 {main} thrown in /home/kayadeve/public_html/kayaIS/isdk.php on line 88

I need help with this error, plus i have questions

  1. one this is done, my applciation will not effetced by sunsetting? even in Feb when they will revoke the legacy key?
  2. in the isdk.php file should i change the $appname to api? and same in the conn.cfg.php?

Please help as the application is too high to change to the latest REST or XML.

Thanks,
Farrukh