I receive Warning 0x00040060 roughly one to two times per week out of roughly five play session. The error reads:
Data Verification Error: An unkown error has occurred.

This occurs when joining the only server I play on with zero mod/map updates (it is a community server). It occurrerd very infrequently during 1.27 but has become a game-breaking issue for 1.28.

In order to correct this I have to reverify all files which usually takes roughly ten minutes. Only a popular server, with a queue, this means going to the back of the line.