Just received this error when I updated the mod and attempted to load my map:

The mod Helmod: assistant for planning your base. (0.12.6) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event helmod::on_configuration_changed
helmod/model/Player.lua:664: attempt to index field 'flags' (a nil value)
stack traceback:
helmod/model/Player.lua:664: in function 'getRecipeEntity'
helmod/model/RecipePrototype.lua:25: in function 'init'
helmod/core/class.lua:25: in function <helmod/core/class.lua:21>
(...tail calls...)
helmod/selector/RecipeSelector.lua:48: in function 'appendGroups'
helmod/selector/RecipeSelector.lua:88: in function 'updateGroups'
helmod/selector/AbstractSelector.lua:333: in function 'prepare'
helmod/controller/Controller.lua:132: in function 'on_init'
helmod/controller/EventController.lua:175: in function <helmod/controller/EventController.lua:153>

Same on my side

So I removed Helmod and redownloaded it, thinking it might fix it and it gave more errors:

The mod Helmod: assistant for planning your base. (0.12.6) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event helmod::on_init()
helmod/model/Player.lua:664: attempt to index field 'flags' (a nil value)
stack traceback:
helmod/model/Player.lua:664: in function 'getRecipeEntity'
helmod/model/RecipePrototype.lua:25: in function 'init'
helmod/core/class.lua:25: in function <helmod/core/class.lua:21>
(...tail calls...)
helmod/selector/RecipeSelector.lua:48: in function 'appendGroups'
helmod/selector/RecipeSelector.lua:88: in function 'updateGroups'
helmod/selector/AbstractSelector.lua:333: in function 'prepare'
helmod/controller/Controller.lua:132: in function 'on_init'
helmod/controller/EventController.lua:101: in function <helmod/controller/EventController.lua:99>

Hello
can you list your mods?

rollback to the last version 0.12.5 to continue your game

v0.12.7 commited.

that solve the problem?

Yes

Yes it did, thank you very much good sir. You are the best.

Solved for me to, your the best. TYVM