estimate_contrasts() returning no values

[strengejacke]

No error, just NA values.

library(modelbased)
data(Salamanders, package = "glmmTMB")
model <- glm(count ~ mined * spp + cover + site, data = Salamanders, family = "poisson")
estimate_contrasts(model, contrast = "mined", by = "spp")
#> NOTE: A nesting structure was detected in the fitted model:
#>     site %in% mined
#> Marginal Contrasts Analysis
#> 
#> Level1 | Level2 |   spp | Difference | 95% CI | SE | df | z | p
#> ---------------------------------------------------------------
#> yes    |     no | DES-L |            |        |    |    |   |  
#> yes    |     no |    DF |            |        |    |    |   |  
#> yes    |     no |    DM |            |        |    |    |   |  
#> yes    |     no |  EC-A |            |        |    |    |   |  
#> yes    |     no |  EC-L |            |        |    |    |   |  
#> yes    |     no |    GP |            |        |    |    |   |  
#> yes    |     no |    PR |            |        |    |    |   |  
#> 
#> Marginal contrasts estimated at mined
#> p-value adjustment method: Holm (1979)

^{Created on 2024-12-17 with reprex v2.1.1}