R2 not available in linear mixed model

[fabstat]

Hello,
I run a linear mixed model (two within: T1 and T2; random T1 / id). Jamovi's results indicate marginal and conditional R2 N/A. Why?

Thank for your help

[mcfanda@gmail.com]

that's usually a sign that the model did not converge or there are issues with convergence. Can you share a omv file to see the model?