See here: Error in finding template space of the input · Issue #556 · PennLINC/xcp_d · GitHub (thanks to @jsein for opening the issue; related to Issue with XCP_D on HPC and TemplateFlow - #13 by jsein). In short, you need certain output spaces from fmriprep (and as of now, NOT other spaces; will be fixed) to run XCP_D.
Best,
Steven