compile fails on Ubuntu 16-20

I did follow the instructions on 'https://github.com/LibreCAD/LibreCAD_3/wiki/Building'
but compile fails with:
LibreCAD_3/lckernel/cad/geometry/geospline.cpp:103:59: error: ‘class tinyspline::BSpline’ has no member named ‘data’
int nbBeziers = ts_bspline_num_control_points(beziers.data()) / splineCurve.order();

What to do about it???
Thanks in advance

geospline.cpp:103:59: error: ‘class tinyspline::BSpline’ has no member named ‘data’

yes  I got same issue.
Did you get  something tip  to solve  for it ?

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ubuntu 20LTS

Sorry no.