Well, if you Google the error message and find this thread, then all is well.
Metadata and Extended Attributes is the related manual page.

This issue is specific to Linux / ext4 where xattr size is limited to 4 kB. Windows / NTFS ADS and macOS / APFS xattr have no size limit, so won't run into this issue. On Linux / BTRFS the limit is 16 kB, so less likely to encounter this issue.
FileBot 5.1.2 notably uses
xz compression for large xattr values on Linux which further ensures that things fit within the file system limits.
FileBot 5.1.2 also adds an additional system property that now allows you to disable mediainfo to xattr caching as a last resort:
Shell: Select all
filebot -script fn:properties --def net.filebot.xattr.cache=false

That said, storing
xattr metadata to
plain/text files doesn't just work around the xattr size limit but also makes
xattr metadata accessible via SMB shares, easy to move and backup, easy to track and view manually, etc. That can become very useful later. See
Optimizations for Remote File Systems for details:
Shell: Select all
filebot -script fn:properties --def net.filebot.xattr.store=.xattr