500 on Approving Request Access to Shared link with invite only option

Iam thinking about one more solution but i am facing bottle neck there. My App is using Dropbox sdk and also a long lived access token which is already stopped by dropbox for new generation. 

My app also has share.write access as well in the admin console. But still when i try to create a link using createsharedlinkwithsettings method iam facing the following error "{"error":{".tag":"missing_scope","required_scope":"sharing.write"},"error_summary":"missing_scope/"}
" .

Note: APP is currently in production and in use and cant risk the loss of or forcing the current  long lived access token to expire by doing some action. So I'm stuck at that level else i would at least run a scheduler to generate link for a list of the folders atleast i need. Walter