https://bugs.winehq.org/show_bug.cgi?id=49990
--- Comment #26 from RayCaster a34ypool3voiz@t-online.de --- (In reply to Rusty Shackleford from comment #25)
Deleting the registry key containing the entries for "DriverDate" and "DriverDateData" caused the embedded chromium to work as expected and seemingly fixed the issue. Using wine-staging 6.4.
Same worked for me on wine-development 6.5 with Lord of the Rings Online's ingame store.