Constantly receiving "october-michigan-lithium" error

If they are server admins yes.

If you’re a server admin and allow trainers(specifically trainers like Lambda that allow you to change your skin), you MUST use a script to force god mode. Otherwise crashing will continue.
Here’s a great one to use [Release] vBasic v4.1 | Basic server settings/configuration
The crash occurs when someone with a custom skin dies. If you allow trainers AND you allow dying, you’re making it extremely easy for people to make the crash occur.