cannot create user

[fbitschy]

hello
i already post on the other isue
but i v got error

when i try to create a admin user with
docker exec sharelatex /bin/bash -c "cd /var/www/sharelatex; grunt user:create-admin --email=vvvvv@gmail.com"

i got :

Running "user:create-admin" task
using statsd
Set UV_THREADPOOL_SIZE=16
{"name":"default-sharelatex","hostname":"d194f7cc61c1","pid":494,"level":30,"msg":"Using newsletter provider: none","time":"2020-04-08T15:09:10.230Z","v":0}
{"name":"default-sharelatex","hostname":"d194f7cc61c1","pid":494,"level":30,"msg":"using smtp for email","time":"2020-04-08T15:09:10.666Z","v":0}
{"name":"default-sharelatex","hostname":"d194f7cc61c1","pid":494,"level":30,"key":"mongo.UserGetter.getUserByAnyEmail","args":{},"elapsedTime":33,"msg":"[Metrics] timed async method call","time":"2020-04-08T15:09:10.745Z","v":0}
Fatal error: user.save is not a function

thanks