genieACS can't write to the database?

Hello
today my first genieacs installation at Ubuntu 18.04.5 LTS, and it seams that genieACS can’t write to the database. defining a new Role at the web gui will be acknowledged with “Configuration has been modified…” but e.g a new role will not be stored

Active: (running) :
genieacs-cwmp.service - GenieACS CWMP
genieacs-nbi.service - GenieACS NBI
genieacs-fs.service - GenieACS FS
genieacs-ui.service - GenieACS UI

show dbs
admin 0.000GB
config 0.000GB
genieacs 0.000GB
local 0.000GB

use genieacs
switched to db genieacs

show collections
cache
config
permissions
presets
provisions
tasks
users

Systlog
Sep 7 13:11:23 acs genieacs-ui[969]: at MINIMAL_IRREDUNDANT (/usr/local/lib/node_modules/genieacs/node_modules/yebool/dist/yebool.cjs:1244:16)
Sep 7 13:11:23 acs genieacs-ui[969]: at IRREDUNDANT_COVER (/usr/local/lib/node_modules/genieacs/node_modules/yebool/dist/yebool.cjs:1251:16)
Sep 7 13:11:23 acs genieacs-ui[969]: at espresso (/usr/local/lib/node_modules/genieacs/node_modules/yebool/dist/yebool.cjs:1422:13)
Sep 7 13:11:23 acs genieacs-ui[969]: at Object.espresso$1 [as espresso] (/usr/local/lib/node_modules/genieacs/node_modules/yebool/dist/yebool.cjs:1476:17)
Sep 7 13:11:23 acs genieacs-ui[969]: at Ut (/usr/local/lib/node_modules/genieacs/bin/genieacs-ui:2:48109)
Sep 7 13:11:23 acs genieacs-ui[969]: at Ft (/usr/local/lib/node_modules/genieacs/bin/genieacs-ui:2:49708)
Sep 7 13:11:23 acs genieacs-ui[969]: at Ht (/usr/local/lib/node_modules/genieacs/bin/genieacs-ui:2:50068)
Sep 7 13:11:23 acs genieacs-ui[969]: at mn.get (/usr/local/lib/node_modules/genieacs/bin/genieacs-ui:2:77183)
Sep 7 13:11:23 acs genieacs-ui[969]: at dispatch (/usr/local/lib/node_modules/genieacs/node_modules/koa-compose/index.js:42:32)
Sep 7 13:11:23 acs genieacs-ui[969]: (node:1542) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 159)

/var/log/mongodb/mongodb.log

2020-09-07T13:13:54.756+0000 I NETWORK [listener] connection accepted from 127.0.0.1:41044 #74 (36 connections now open)
2020-09-07T13:13:54.758+0000 I NETWORK [conn74] received client metadata from 127.0.0.1:41044 conn: { driver: { name: “nodejs”, version: “3.6.0” }, os: { type: “Linux”, name: “linux”, architecture: “x64”, version: “4.15.0-112-generic” }, platform: “'Node.js v10.22.0, LE (unified)” }

empty
genieacs-cwmp-access.log
genieacs-fs-access.log
genieacs-nbi-access.log