After 7 months from the first version of Lumen the 2.0 we release a new version the 2.1. This version fixes different bugs in compilation and executions but it also introduce different new features as non-linear response within the Floquet formalism or the symmetry analysis for the excitons.

Release notes can be found here:
https://www.lumen-code.org/wiki/index.php?title=Lumen_2.1

and the code here:
https://gitlab.com/lumen-code/lumen/-/releases/2.1.0