BUG: Fix array creation for string dtype with inconsistent list lengths (pandas-dev#61155)

Author: Manju080

pandas/core/arrays/string_.py

@@ -639,7 +639,7 @@ def _from_sequence(
                 dtype = StringDtype(storage="python")
 
         from pandas.core.arrays.masked import BaseMaskedArray
-
+        
         na_value = dtype.na_value
         if isinstance(scalars, BaseMaskedArray):
             # avoid costly conversion to object dtype
@@ -655,6 +655,8 @@ def _from_sequence(
                 #  zero_copy_only to True which caused problems see GH#52076
                 scalars = np.array(scalars)
             # convert non-na-likes to str, and nan-likes to StringDtype().na_value
+            if isinstance(scalars, list) and all(isinstance(x,list) for x in scalars):
+                scalars =[str(x) for x in scalars]
             result = lib.ensure_string_array(scalars, na_value=na_value, copy=copy)
 
         # Manually creating new array avoids the validation step in the __init__, so is