type error

[varis1]

whenever I change from the html- to the normalview in the change metadata window I get this message:

calibre, version 4.9.0
FEHLER: Unbehandelter Ausnahmefehler: <b>TypeError</b>:unbound method toPlainText() must be called with PlainTextEdit instance as first argument (got QPlainTextEdit instance instead)

calibre 4.9 Portable embedded-python: True is64bit: False
Windows-10-10.0.17763-SP0 Windows ('32bit', 'WindowsPE')
32bit process running on 64bit windows
('Windows', '10', '10.0.17763')
Python 2.7.16+
Windows: ('10', '10.0.17763', 'SP0', u'Multiprocessor Free')
Interface language: de
Successfully initialized third party plugins: DeDRM (6, 6, 3) && Modify ePub (1, 4, 0) && KoboTouchExtended (3, 1, 5) && Kobo Utilities (2, 9, 0) && Clean Metadata (0, 0, 6) && EpubMerge (2, 8, 0) && Walk Search History (1, 3, 2) && Quality Check (1, 9, 11) && Ex Libris (1, 0, 19) && Resize Cover (1, 0, 2) && Find Duplicates (1, 6, 3) && Hyphenate This! (0, 0, 9)
Traceback (most recent call last):
File "site-packages\calibre\gui2\comments_editor.py", line 1142, in change_tab
TypeError: unbound method toPlainText() must be called with PlainTextEdit instance as first argument (got QPlainTextEdit instance instead)


what to do?

[kovidgoyal]

update to 4.9.1