Add tab bar missing data

Hello everyone.
I have problem en my app . I finished everything but when i try to add tab bar and link it its making me this of missing data can someone helped me plz
this is befor add


and this is after

Hi @nouh8787

There are plenty of posts in this forum related to that issue. This search.

I would recommend going through them, as they provide guidance on how to resolve this problem.

Remember, most issues have already being posted in the forum. A simple search will take you to other posts where solutions have been provided.

thx for your answer . i checked but still cannot find the solution

Sometimes it’s because to many button are linked with the same screen and this screen don’t know wich data he need to use

thx for your answer . i check and it’s not about button . if you have time and you can help me I will be thankful to you . this is my whatsapp ( 0034632397565)