Generating a PLL IP fails on Quartus Prime Pro

Generating a simple PLL IP for an Agilex 3 using Quartus Pro fails. See error below: Error: add_fileset_file: No such file C:/altera_pro/26.1/ip/altera/altera_iopll/top/{C:/Users/ /AppData/Local/Temp/alt0666_1092945879227822690.dir/0003_iopll_0_gen/