Facing error "String {16} (It shows on white blank screen after saving product)"

[faseehharis]

Whenever i save product from module, it shows me white screen written on 

String {16}

 

I dont know what kind of issue it is. my product save successfully when i go back and see details of product. but when i click on save button, i was getting product saved successfully message. but now i am facing white screen written on 

String {16}

 

Kindly help me in this regard, what kind  of this error is and how can i fix it from code or from anywhere else.

 

 

 

Thanks in advance