Error while running event sonaxaton-resource-map-markers::on_configuration_changed
LuaEntityPrototype doesn't contain key set.
stack traceback:
sonaxaton-resource-map-markers/control.lua:293: in function 'patches_for_each'
sonaxaton-resource-map-markers/control.lua:402: in function 'hide_tags'
sonaxaton-resource-map-markers/control.lua:482: in function 'clear_tags'
sonaxaton-resource-map-markers/control.lua:494: in function 'tag_all'
sonaxaton-resource-map-markers/control.lua:527: in function <sonaxaton-resource-map-markers/control.lua:526>
stack traceback:
[C]: in function 'index'
__sonaxaton-resource-map-markers/control.lua:293: in function 'patches_for_each'
sonaxaton-resource-map-markers/control.lua:402: in function 'hide_tags'
sonaxaton-resource-map-markers/control.lua:482: in function 'clear_tags'
sonaxaton-resource-map-markers/control.lua:494: in function 'tag_all'
sonaxaton-resource-map-markers/control.lua:527: in function <sonaxaton-resource-map-markers/control.lua:526>

Thanks for the report, will get a fix out ASAP!

It is a migration error.
Save loaded well after:

/resource-map-markers clear

Yep, released v0.2.1 with a migration to fix it.