cubicweb #1333236 configuring boxes crashes with traceback [resolved]

log in as admin, click on 'site administration', choose a box, for example "possible views" and click on visible "yes", then validate. You get a traceback:

File /home/nico/encours/forests/cubicweb_forest/cubicweb/req.py, line 99, function eid_rset:
  eid = typed_eid(eid)
TypeError: int() argument must be a string or a number, not 'list'
prioritynormal
typebug
done in3.10.3
load left0.000
closed by#f13c47ac9137 [ui controller] closes #1333236: configuring boxes crashes with traceback