# \[SOLVED\]After use this block my app got white screen **URL:** https://community.thunkable.com/t/solved-after-use-this-block-my-app-got-white-screen/569010 **Category:** Questions about Thunkable X **Created:** [May 15, 2020, 11:01pm UTC](https://community.thunkable.com/t/solved-after-use-this-block-my-app-got-white-screen/569010 "2020-05-15T23:01:55Z") **Posts on this page:** 3 **Page:** 1
### Author: ![mattia.guariglia](https://avatars.discourse-cdn.com/v4/letter/m/a9a28c/32.png) [@mattia.guariglia](https://community.thunkable.com/u/mattia.guariglia) #### Post date: [May 15, 2020, 11:01pm UTC](https://community.thunkable.com/t/solved-after-use-this-block-my-app-got-white-screen/569010/1 "2020-05-15T23:01:55Z")
Hi, after the update use "make list from text "lock my app with white screen. But before updateI never had problems with this block… Look your self ![error](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/8/3/83610a7e000dce475fc505d412a29b943acc65c3.png) [https://streamable.com/v5t1zg](https://streamable.com/v5t1zg) If i remove this block white screen does not appear. I have the same result if i try it on iphone or android phone. ---
### Author: ![mattia.guariglia](https://avatars.discourse-cdn.com/v4/letter/m/a9a28c/32.png) [@mattia.guariglia](https://community.thunkable.com/u/mattia.guariglia) #### Post date: [May 16, 2020, 7:29am UTC](https://community.thunkable.com/t/solved-after-use-this-block-my-app-got-white-screen/569010/2 "2020-05-16T07:29:50Z")
Solved, i just add a if value not null and now work, but before worked also without it. ---
### Author: ![ioannis](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/ioannis/32/146956_2.png) [@ioannis](https://community.thunkable.com/u/ioannis) #### Post date: [November 8, 2024, 11:26am UTC](https://community.thunkable.com/t/solved-after-use-this-block-my-app-got-white-screen/569010/3 "2024-11-08T11:26:47Z")