Can anybody tell me how to fix this?
I want to get the original strings 

i used confuser unpacker + de4dot

Try

1.) String Decryptor

2.) Constant Decryptor

6 minutes ago, Prab said:

Try

1.) String Decryptor

2.) Constant Decryptor

I'll try it now let me check

23 minutes ago, Prab said:

Try

1.) String Decryptor

2.) Constant Decryptor

 

Still not fix.
 

If you want class names/method names restored to original names this can't be done. The reason is that names are completely lost on name obfuscation process.
 

I think u made the wrong deobf way 

Try in another way