took forever, but I am finally able to get these up. I cleared my cache in Firefox, and the tried dragging/dropping aobut 4 times with no luck. Finally when I did the "add files" (browse) option they loaded immediately
Salt Lake City USA www.brachdesign.com
AC24 MBP OS Catalina 10.15.7
2.6 GHz 6core intel core i7 16 GB RAM
Radeon Pro 555X 4096 MB
Intel UHD Graphics 630 1536 MB
Thank you very much for your report and I am very sorry about the issue!
To investigate further, could you share with us the file in PLA format so that we can recreate the BIMx in-house and investigate further? Please let me know if you need a secure place to upload the file also.
Looking forward to hearing from you!
P/s: in the future, if you encounter any problem with BIMx, please don't hesitate to contact us at email@example.com.