Controller not Working With HTTPS protocol

hi, i used codeignitor many times but this issue is very strange for me 

Problem with HTTPS protocol

when i upload my code on hosting that have HTTPS protocol installed it cant access controller function check this

Default controller run first time 
https://sowportal.ml
but when i opened controller like this
https://sowportal.ml/proposal/new_proposal

it show me page not found error

Without HTTPS
i upload same code on my other hosting
http://businessholics.com/portal
it run normally 
and when access controller its working normally 
http://businessholics.com/portal/proposal/new_proposal

i also set https in base url

thanks
looking forward for your responce

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