why my materials wont load properly evertime i restart my project..

i mean, everytime i restart my project… some of material wont read my texture while others is fine… and everytime i build the texture stream the project is crashing with this message appearing :

LoginId:1539458646d7df9803e2e5acff71952b
EpicAccountId:32cc25350f14403d97280ff153377872

You do not have any debugging symbols required to display the callstack for this crash.

i’m using ue 4.16.2,
this is my pc spec :
i7 7700 3.60 ghz
geforce gtx 1080
16 gb ram
directx 12

You can get debugging symbols on this menu. Which may help to narrow down your problem.

191768-ue_answerpic17a.png