[3.2-4] local lvm storage not available in the web interface

[_Lars_]

I'm testing the latest version. Trying to add my local LVM storage does not work:

Datacenter -> Tab "Storage" -> Add -> LVM

Dialog "Add: LVM" appears but the drop-down list "Volume Group:" ist empty.
All volume groups are setup correctly, a 'vgs' shows:

  VG      #PV #LV #SN Attr   VSize  VFree
  pve       1   1   0 wz--n- 32,56g    0 
  storage   1   0   0 wz--n-  1,79t 1,79t

What am I doing wrong?