Update reflex/experimental/hybrid_property.py

Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com>

Author: benedikt-bartscher

reflex/experimental/hybrid_property.py

@@ -30,7 +30,8 @@ def __get__(self, instance: Any, owner: type | None = None, /) -> Any:
             # Call custom var function if set
             return self._var(owner)
         # Call the property getter function if no custom var function is set
-        assert self.fget is not None
+        if self.fget is None:
+            raise AttributeError("HybridProperty has no getter function")
         return self.fget(owner)
 
     def var(self, func: Callable[[Any], Var]) -> Self: