[R] interpreting error estimate in SEM

hi, I'm using the sem package, and I want to make sure I'm interpreting the output correctly. Here is an excerpt of my output. When I report the MWD error, should I say that 59% of the variation in MWD is not explained by the model, or that 59% of the variation is explained, or something entire

[R] SEM decomposition of Hessian

I'm trying to run an SEM, but I keep getting the following error message. In sem.default(ram = ram, S = S, N = N, param.names = pars, var.names = vars, : Could not compute QR decomposition of Hessian. Optimization probably did not converge. I have 4 latent variables (plant, AMF, abiotic, and s