I don't usually write Java, but as a helper, a project came in, so it's an error memo at that time.
The local environment that was working a while ago has stopped working due to the following error!
[error] application - java.lang.IllegalStateException: JSR-303 validated property 'hogeCode' does not have a corresponding accessor for data binding - check your DataBinder's configuration (bean property versus direct field access)
Execute the following command!
$ activator clean $ activator compile
It seems that I was messing with the files under bin in the FW by mistake, and I got a compile error.
Therefore, once I cleared the intermediate file with ʻactivator clean
and recompiled with ʻactivator compile, it worked fine.