Many Thanks Mica,
Now Darktable starts and in export module the DRI or DFF menu is visible in export Module.
Terminal shows following:
[ruudm@ruud-ax370gaming3 ~]$ darktable -d lua
(darktable:4387): Gtk-WARNING **: 17:49:23.675: Theme parsing error: gtk.css:68:35: The style property GtkButton:child-displacement-x is deprecated and shouldn’t be used anymore. It will be removed in a future version
(darktable:4387): Gtk-WARNING **: 17:49:23.675: Theme parsing error: gtk.css:69:35: The style property GtkButton:child-displacement-y is deprecated and shouldn’t be used anymore. It will be removed in a future version
(darktable:4387): Gtk-WARNING **: 17:49:23.675: Theme parsing error: gtk.css:71:36: The style property GtkCheckMenuItem:indicator-size is deprecated and shouldn’t be used anymore. It will be removed in a future version
(darktable:4387): Gtk-WARNING **: 17:49:23.675: Theme parsing error: gtk.css:76:30: The style property GtkExpander:expander-size is deprecated and shouldn’t be used anymore. It will be removed in a future version
1,258786 LUA ERROR Enfuse pro plugin version 2.1.6 loaded
I am going to test the lua.