Thanks - my output included no such warning.
(lyluatex) Compiling score tmp-ly/51d5af77a942f28ac1f5986a0ab47d35 with LilyPond executable 'lilypond'.
Module lyluatex Warning: The score doesn't contain any music:
(lyluatex) this will probably cause bad output. on input line 8vim
(./ts.aux))
431 words of node memory still in use:
3 hlist, 1 vlist, 1 rule, 2 glue, 3 kern, 1 glyph, 6 attribute, 50 glue_spec
, 6 attribute_list, 2 write, 1 pdf_colorstack nodes
avail lists: 2:10,3:1,4:1,5:4,7:1,9:1
warning (pdf backend): no pages of output.