I’ve found what’s causing this:
https://github.com/openhab/openhab-webui/commit/299f300dbf719d53cdfc40a09f2a9357ca5d6514
I haven’t figured out how to fix it though, except establishing that it start working if I remove:
:init-options="{
locale: ECHARTS_LOCALE
}"
Could it be that there are other “init-options” that have defaults assigned if no object is provided, but that are “undefined” as soon as an object is provided?
Another option is that it’s caused by the locale being invalid. In my case, the locale doesn’t exist (probably isn’t implemented by echarts).