MINERVANET - Error Report #38 - opening map with overlay id

id: 38
url: https://pg-sandbox.uni.lu/minerva/index.xhtml?id=PDmapWin19&background=4830&overlays=test&
login: ewa.smula
email: ewa.smula@uni.lu
browser: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.109 Safari/537.36
timestamp: 2019-02-19T12:16:42Z
version: 12.2.0~beta.1
comment: 
stacktrace: Error: invalid id: NaN
    at CustomMap.openDataOverlay (https://pg-sandbox.uni.lu/minerva/javax.faces.resource/minerva.js.xhtml?ln=js&m_version=c16fe7092b7ebece353383a932d997bacf7d4648:255106:11)
    at https://pg-sandbox.uni.lu/minerva/javax.faces.resource/minerva.js.xhtml?ln=js&m_version=c16fe7092b7ebece353383a932d997bacf7d4648:255005:21
>From previous event:
    at https://pg-sandbox.uni.lu/minerva/javax.faces.resource/minerva.js.xhtml?ln=js&m_version=c16fe7092b7ebece353383a932d997bacf7d4648:255003:20
>From previous event:
    at CustomMap.init (https://pg-sandbox.uni.lu/minerva/javax.faces.resource/minerva.js.xhtml?ln=js&m_version=c16fe7092b7ebece353383a932d997bacf7d4648:254983:6)
    at https://pg-sandbox.uni.lu/minerva/javax.faces.resource/minerva.js.xhtml?ln=js&m_version=c16fe7092b7ebece353383a932d997bacf7d4648:273362:22
>From previous event:
    at Object.create (https://pg-sandbox.uni.lu/minerva/javax.faces.resource/minerva.js.xhtml?ln=js&m_version=c16fe7092b7ebece353383a932d997bacf7d4648:273301:6)
    at initMap (https://pg-sandbox.uni.lu/minerva/index.xhtml?id=PDmapWin19&background=4830&overlays=test&:29:20)
    at onload (https://pg-sandbox.uni.lu/minerva/index.xhtml?id=PDmapWin19&background=4830&overlays=test&:40:45)
.

by @ewa.smula