@BossDogg, D2R Fails to launch after recent B_Net Update on Linux with WINE/Lutris (got no Diabolo, so i can’t reply directly.)
On my PC also Battle.Net stopped working, yesterday it worked, today it was broken. Mint 21.3 but RTX 4070.
Somehow I could solve it by using Timeshift, I simply reactivated an earlier snapshot and than installed the updates again. Now Battle.Net runs as usually - But I cannot tell you why this works on my PC.