Among other mods, I use P0sty, which caused a crash shortly after entering the new waterlogged biome and engaging a water strider. That isn't a problem.
The alarming bit is that after this crash, I'm unable to start the game, even without the mod - the master shard will complete initialisation, logging "Reset() returning", and then immediately crash with only the OS crashlog, and no lua stacktrace.
dontstarve_dedicated_server_nullrenderer_2021-08-26-224012_roberta.crash dontstarve_dedicated_server_nullrenderer_2021-08-26-223331_roberta.crash dontstarve_dedicated_server_nullrenderer_2021-08-26-222929_roberta.crash server_log_2021-08-26-22-37-30.txt Cluster_DSTU_1-crash.tgz
Launch the attached cluster, with or without mods.