...

kitty/clipboard.py

@@ -72,6 +72,8 @@ def get_available_mime_types_for_paste(self) -> Tuple[str, ...]:
 
     def __call__(self, mime: str) -> Callable[[], bytes]:
         data = self.data.get(mime, b'')
+        if isinstance(data, str):  # type: ignore
+            data = data.encode('utf-8')  # type: ignore
         if isinstance(data, bytes):
             def chunker() -> bytes:
                 nonlocal data