On Startup Settings In Chrome Disabled

Today when i turn on my laptop i haven't got the tabs which i have left opened in Google Chrome under start up settings (Continue where I Left Off). 

On Start-up Settings In Chrome Disabled

Its so disturbing as i have opened some tabs from time to time even i can't reopen by seeing history and then select those tabs which are of my need and were opened. It will be so time consuming that i will do to re-open all tabs again by seeing history. If anyone knows the solution please tell me for future.