I need to install my custom package from softaculous by API. I have created a custom package in softaculous its working fine when I install from WHM but I need to install from API. If I install WordPress API then it's working. Wordpress is installed successfully. I am using below link for install package by API
https://softaculous.com/docs/API#Install_a_Script
In this section, you will see 26 is for WordPress. My package Id is 1001. When I set 1001 then my package will not install.
The ID for custom scripts in Softaculous starts with 10001 (ten thousand and one) and it seems you are using 1001.
Please try with 10001 and I am sure it will work.
Do let me know if it does not work.