I've been running a video game sandboxed with 10 or 12 clients. Their rules and regulations limit it to 2 multi-clients only, that's why I've been using Sandboxie-Plus.
Now it has been running for almost a month perfectly and now today sandboxing the launcher of the game auto-crashes and displays an error message called "SBIE2224"
Tried
deleting the content of each box and creating a fresh one,
sandboxing the game's folder,
sandboxing the game launcher,
reinstalling the game,
reinstalling and updating to the latest Sandboxie-Plus,
restarting my PC,
and updating Windows 10.