Hi, I did wipe everything and restarted from scratch using HyperHQ 2.0.102 and Hyperspin 2.0.54. It worked well, I added something like 30 systems until I faced the same issue again : Stuck at just past the ... on, "Loading system and rom assets..."
Log info says : Wheel Service => Wheel Load => Reading All Remaining Assets Into Pixi JS From Directory Recursively Except Main Menu [ '[]' ]
Rik81 has also reported the same issue