I am getting undefined Offset:0 error in laravel, when I am adding any title after url

I am getting undefined offset: 0 error in laravel, Basically this is my Original url: http://127.0.0.1:8000/property/paradis-sector-62 .. But if i replace in place of paradis-sector-62 to asbhbhuvu (or anything else), then it shows error. Can u please help me how i will solve this issue.

via Chebli Mohamed