Please see error log below and file attached. This error happens frequently for any tracks that have been tagged previously.

 

D: 22:10:45,638 ui.itemviews.dropMimeData:568: Drop target = <Cluster 'Unclustered Files'>

D: 22:10:45,640 ui.itemviews.drop_urls:529: Dropped the URL: 'file:///D:/Music/MusicBee/Music/Big Sean/Finally Famous/03 My Last.m4a'

D: 22:10:45,642 tagger.add_files:475: Adding files [<MP4File '03 My Last.m4a'>]

D: 22:10:45,642 file._move:524: Moving <MP4File '03 My Last.m4a'> from None to <Cluster 'Unclustered Files'>

D: 22:10:45,643 formats.mp4._load:148: Loading file 'D:\\Music\\MusicBee\\Music
Big Sean
Finally Famous
03 My Last.m4a'

E: 22:10:45,645 util.thread.run:56: Traceback (most recent call last):

File "site-packages\mutagen\mp4_init_.py", line 1073, in load

File "site-packages\mutagen\mp4_init.py", line 343, in __init_

File "site-packages\mutagen\mp4_init_.py", line 363, in load

File "site-packages\mutagen\mp4_init_.py", line 595, in __parse_freeform

File "site-packages\mutagen_util.py", line 558, in <lambda>

struct.error: unpack requires a buffer of 4 bytes

 

During handling of the above exception, another exception occurred:

 

Traceback (most recent call last):

File "picard\util\thread.py", line 52, in run

File "picard\file.py", line 142, in _load_check

File "picard\formats\mp4.py", line 150, in _load

File "site-packages\mutagen_file.py", line 49, in _init_

File "site-packages\mutagen_util.py", line 140, in wrapper

File "site-packages\mutagen\mp4_init_.py", line 1077, in load

File "site-packages\mutagen_compat.py", line 86, in reraise

File "site-packages\mutagen\mp4_init_.py", line 1073, in load

File "site-packages\mutagen\mp4_init.py", line 343, in __init_

File "site-packages\mutagen\mp4_init_.py", line 363, in load

File "site-packages\mutagen\mp4_init_.py", line 595, in __parse_freeform

File "site-packages\mutagen_util.py", line 558, in <lambda>

mutagen.mp4.MP4MetadataError: unpack requires a buffer of 4 bytes

 

D: 22:10:45,653 file.update:572: Updating file <MP4File '03 My Last.m4a'>