Internal Error: Sub-system: VPR20KMAIN, File: /quartus/fitter/vpr20k/vpr_common/cluster_region_tight

Hello all, i describe you my problem : i work on Cyclone V GX (SoC) and fit on quartus prime 17.1 --> i have a qsys core connected to a nios embedded core which worked up to now. I only add o...