ERROR: Prompt not detected - upload failed. Trying to recover...

The issue is just that your code is taking longer to execute than expected.

Usually, the code you upload should execute as fast as possible, and then you should do any calculations in callback functions - ideally making them execute quickly.

So if you do:

function go() {
var plain=new Int8Array(16);
var key=new Int8Array(16);
var crypt=new Int8Array(16);
var dcrypt=[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]­;
var i;
var j;
var k;
for(i=0;i<16;i++){
  plain[i]=0;
  key[i]=1;
  dcrypt[i]=0;
}//nexti
for(k=0;k<256;k++){
 plain[1]=k;
 for(i=0;i<256;i++){
  plain[0]=i;
  crypt=AES.encrypt(plain,key,{mode:'ECB'}­);
  for(j=0;j<16;j++)dcrypt[j]+=(crypt[j]/25­6);
 }//nexti
}//nextk
for(j=0;j<16;j++)console.log(dcrypt[j]/2­56);
}
setTimeout(go, 500);

It'll work fine. Or you could just call go() from the left-hand side after upload