method '<method name>'('<method name>') not defined in service('' '')

[jigsdatta]

HI,

I am using nusoap with php7.3 with my current Codeigniter 2.1 version. Now I am upgrading the php version to php8.2 and Codeigniter version to 4. And I found this upgrade library for nusoap to work with php8.2. But after integrating it in App/Libraries it throws below error while calling the webservice which is generated using nusoap_server class?

method '<method name>'('<method name>') not defined in service('' '')

Please help me out to solve this issue. I think it is related to the namespace which we used in each class and seperated all nusoap class in seperate file.