Two stray conflict copies ship inside FluentPlayer 1.4.0
fluent-player/vendor/composer/ in the 1.4.0 package contains two leftovers:
autoload_classmap.php 8-00-56-387 PM.php
autoload_static.php 8-00-56-388 PM.php
They are older generations of the two files beside them. The character before
PM is U+202F, a narrow no-break space, so they hide from most searches β the
packing machine seems to have a Windows or OneDrive working copy, which might be
worth a look for other files too.
Nothing loads them, so there is no visible effect. Two reasons to drop them
anyway: the stale autoload_static.php declares the same class as the real one
(ComposerStaticInite225e5c2f238500e04febbf6be1b78d1), so anything that ever
included both would fatal; and they are publicly addressable PHP inside the
plugin directory.