[fix] setupkoenv: change "ERROR" to "(warning)" (#3860)
[fix] setupkoenv: change "ERROR" to "(warning)" (#3860)

Not all failures to load are fatal. I still worry that this might be too noisy but it'd be useful to always have available.
mwoz123/koreader,houqp/koreader,poire-z/koreader,lgeek/koreader,Hzj-jie/koreader,pazos/koreader,NiLuJe/koreader,koreader/koreader,poire-z/koreader,Markismus/koreader,mihailim/koreader,Frenzie/koreader,Frenzie/koreader,koreader/koreader,NiLuJe/koreader