incompatible with gtk4: failed to parse

[kdarras]

this is the error I get when saving the twig.lang file:

/usr/share/gtksourceview-4/language-specs/twig.lang:5: parser error : XML declaration allowed only at the start of the document

 ^

(gedit:5196): GtkSourceView-WARNING **: 17:03:38.299: Failed to parse '/usr/share/gtksourceview-4/language-specs/twig.lang'

(gedit:5196): GtkSourceView-WARNING **: 17:03:38.300: Error reading language specification file '/usr/share/gtksourceview-4/language-specs/twig.lang'

(gedit:5196): Tepl-WARNING **: 17:03:44.055: GVfs metadata is not supported. Fallback to TeplMetadataManager. Either GVfs is not correctly installed or GVfs metadata are not supported on this platform. In the latter case, you should configure Tepl with --disable-gvfs-metadata.

I don't know why I get the error that the XML declaration is allowed only at the start of the document, because that's where it is.