the app can not work after repack

[Kcrafting]

i follow the step to update my app(one of it's dll,i lost the file),but the app crash when i click the app,is there some possibly reason for my problem?

[rob-X1]

Assuming you are talking about an Android app: have you checked if the problem is really related to pyxamstore repacking?

May be just resigning is enough to cause the "crash". Some apps check their app signature or use other ways to check that the have not been modified and if the detect a modification just terminate itself.

[Kcrafting]

i have found two file in the blob file,one is projectname.dll,another is projectnameandroid.dll,i modify the projectnameandroid.dll with dnspy,i only modify the request url,i use apktoolkit for all process,decompile,compress blob file,modify file,repack blob file,replace file,compile app,align zip,sign app,after all process,now the app could be install and open,now it's not crash,but there is no ui displayed,only black screen,i don't know why