Fix soft prompt loading code

aiserver.py

@@ -2295,9 +2295,10 @@ def spRequest(filename):
 
     z, version, shape, fortran_order, dtype = fileops.checksp(filename, vars.modeldim)
     assert isinstance(z, zipfile.ZipFile)
+    z.close()
 
-    with z.open('tensor.npy') as f:
-        tensor = np.load(f, allow_pickle=False)
+    with np.load(fileops.sppath(filename), allow_pickle=False) as f:
+        tensor = f['tensor.npy']
 
     # If the tensor is in bfloat16 format, convert it to float32
     if(tensor.dtype == 'V2'):
@@ -2305,7 +2306,8 @@ def spRequest(filename):
         tensor = np.uint32(tensor) << 16
         tensor.dtype = np.float32
 
-    tensor = np.float16(tensor)
+    if(tensor.dtype != np.float16):
+        tensor = np.float32(tensor)
     assert not np.isinf(tensor).any() and not np.isnan(tensor).any()
 
     vars.sp = torch.from_numpy(tensor)