With the 0.17.58 the mod caused a non-recoverable error.

The mod Floating Damage Indicators caused a non-recoverable error.
Please report this error to the mod author.

Error while running event floating-damage-text::on_configuration_changed
The mod Clock caused a non-recoverable error.
Please report this error to the mod author.

Error while running event clock::on_runtime_mod_setting_changed (ID 59)
clock/control.lua:195: bad argument #3 of 3 to 'index' (string expected, got nil)
stack traceback:
[C]: in function '__index'
__clock/control.lua:195: in function <clock/control.lua:194>
stack traceback:
floating-damage-text/control.lua:89: in function <floating-damage-text/control.lua:83>
stack traceback:
[C]: in function 'newindex'
__floating-damage-text/control.lua:89: in function <floating-damage-text/control.lua:83>

It's an error caused by the other mod (Clock). I've passed along the relevant details to the author.

If you wish to play with both mods in the meantime, you should be able to bypass the error by disabling the mod, updating everything to the latest version, loading the game without the mod, creating a save, then reenabling the mod.