[sininenkuu]

This error just started yesterday. I've tried uninstalling and reinstalling Calibre to the latest version, and it still persists. It appears when adding new books, and adding new plugins, but updating plugins worked just fine. Any and all help greatly appreciated!

calibre, version 3.16.0
ERROR: Unhandled exception: <b>Exception</b>:File dialog failed (return code 1073741845): Assertion failed: Successful WSASTARTUP not yet performed (..\..\..\..\src\signaler.cpp:192)


calibre 3.16 [64bit] embedded-python: True is64bit: True
Windows-10-10.0.16299-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.16299')
Python 2.7.12+
Windows: ('10', '10.0.16299', 'SP0', u'Multiprocessor Free')
Interface language: None
Successfully initialized third party plugins: DeDRM (6, 3, 4) && Kindle and Mobipocket DeDRM (0, 4, 19) && Ignoble Epub DeDRM (0, 2, 6) && Inept PDF DeDRM (0, 2, 0) && Inept Epub DeDRM (0, 2, 1) && eReader PDB 2 PML (0, 0, 8) && Find Duplicates (1, 6, 3) && Diaps Editing Toolbag (0, 3, 5) && Kindle Collections (1, 7, 17)
Traceback (most recent call last):
File "site-packages\calibre\gui2\actions\add.py", line 424, in add_books
File "site-packages\calibre\gui2\win_file_dialogs.py", line 252, in choose_files
File "site-packages\calibre\gui2\win_file_dialogs.py", line 206, in run_file_dialog
Exception: File dialog failed (return code 1073741845): Assertion failed: Successful WSASTARTUP not yet performed (..\..\..\..\src\signaler.cpp:192)