(gnome-software:5533): Gs-ERROR **: CSS parsing error: not a number

Thread 1 "gnome-software" received signal SIGTRAP, Trace/breakpoint trap.
0x00007ffff467428b in g_logv () from /lib64/libglib-2.0.so.0
(gdb) where
#0  0x00007ffff467428b in g_logv () from /lib64/libglib-2.0.so.0
#1  0x00007ffff46743ff in g_log () from /lib64/libglib-2.0.so.0
#2  0x00005555555a91cc in css_error ()
#3  0x00007ffff49413c5 in g_closure_invoke () from /lib64/libgobject-2.0.so.0
#4  0x00007ffff4953412 in signal_emit_unlocked_R () from /lib64/libgobject-2.0.so.0
#5  0x00007ffff495c03f in g_signal_emit_valist () from /lib64/libgobject-2.0.so.0
#6  0x00007ffff495c41f in g_signal_emit () from /lib64/libgobject-2.0.so.0
#7  0x00007ffff637847b in _gtk_css_parser_error () from /lib64/libgtk-3.so.0
#8  0x00007ffff63790e0 in gtk_css_dimension_value_parse () from /lib64/libgtk-3.so.0
#9  0x00007ffff6387001 in parse_font () from /lib64/libgtk-3.so.0
#10 0x00007ffff638506a in gtk_css_shorthand_property_parse_value () from /lib64/libgtk-3.so.0
#11 0x00007ffff637bfaf in gtk_css_provider_load_internal () from /lib64/libgtk-3.so.0
#12 0x00007ffff637d132 in gtk_css_provider_load_from_file () from /lib64/libgtk-3.so.0
#13 0x00005555555a8cf3 in theme_changed ()
#14 0x00005555555a926c in gs_application_initialize_ui.part ()
#15 0x00005555555a9798 in gs_application_activate ()
#16 0x00007ffff49415f4 in _g_closure_invoke_va () from /lib64/libgobject-2.0.so.0
#17 0x00007ffff495bdb9 in g_signal_emit_valist () from /lib64/libgobject-2.0.so.0
#18 0x00007ffff495c41f in g_signal_emit () from /lib64/libgobject-2.0.so.0
#19 0x00007ffff4c3012d in g_application_real_local_command_line () from /lib64/libgio-2.0.so.0
#20 0x00007ffff4c30322 in g_application_run () from /lib64/libgio-2.0.so.0
#21 0x0000555555570bff in main ()