FYI, the solution was to pre-download the templateflow folder and put it in my home directory, and then put “setenv SINGULARITYENV_TEMPLATEFLOW_HOME /home/templateflow” at the start of my mriqc run command. This is similar to what was needed previously for fmriprep, as noted here: Problems using pediatric template from TemplateFlow
I’m not sure why I was only getting this error when using mriqc (not fmriprep) and even then only for anatomical analyses, but this seemed to fix it.
Best,
Jeremy