Problem With Look up pair


i face problem in look up fair.Some device my app working fine.But some device show below error.
I using json format. and empty value present in here.

But I can’t see any error in json file.
How to detect this error now?


Show the blocks you are using. And give more info about you problem.


Finallay i solved my problem.


Maybe tell how you did it. Others could learn from that.


actually problem in my database.Some users data didnot show properly.thats why i faced this problem.