I installed the latest update yesterday afternoon (Friday Feb 15) and since then the online player has crashed on me three times.
I am running on MAC OS and using the online player while also playing or Roll20 and using Discord video chat with 6 other players. The moods I was running during the crashes were:
DH Yawning Portal “Troll” (twice)
DH Finding Floon “Dock Ward”
During each crash I hear only that strange sound you get when a CD is scratched, a rapidly repeating sound that pulses every fraction of a second. Furthermore, I am unable to quit the online player application except by selecting “force quit.”
I hope this helps with your debugging.