Diagnostic plot in module `tm_a_mmrm` does not appear for `Adjustment Method`

[kartikeyakirar]

The adjustment method "Kenward-Roger-Linear" does not exist, and an error has occurred.

'arg' should be one of "Satterthwaite", "Kenward-Roger", "Residual", "Between-Within" 
 when evaluating qenv code:
fit <- tern.mmrm::fit_mmrm(vars = list(response = "AVAL", covariates = NULL, id = "USUBJID", arm = "ARM", visit = "AVISIT"), data = anl, conf_level = 0.95, method = "Kenward-Roger-Linear", cor_struct = "unstructured", weights_emmeans = "proportional", parallel = TRUE)