get_contrast_type3 error

[elizabethbeard]

Hi,

I have been unable to use the get_contrast_type3 function for a lmerTest object and am unsure why. I've included screenshots below of the errors I am getting. I use R version 3.6.3 and RStudio version 1.2.5. I've tried to install lmerTestR manually, using devtools, and through both the Global and a US-based CRAN repository. Is there a reason why this doesn't seem to work for me?

Thank you for your time and an amazing statistical tool!