Sync Admin Status

Hey there.

I hope someone can help me with my problem here.

I setup wekan in docker and got LDAPS over port 636 working all fine.

I now want to sync a specific group as an administrator group, that's where I get errors and cannot login anymore at all.

[INFO] LDAP connected
[INFO] Binding UserDN "PATH"
[INFO] Searching user "USERNAME"
[DEBUG] searchOptions {
  "filter": "(&(sAMAccountName=USERNAME))",
  "scope": "sub",
  "sizeLimit": 0
}
[DEBUG] BaseDN "DOMAINROOT"
[INFO] Search result count 1
[INFO] Authenticating "PATH"
[INFO] Authenticated "PATH"
[DEBUG] Identifying user with: sAMAccountName
[INFO] Querying user
[DEBUG] userQuery {
  "services.ldap.id": "786e31231231235"
}
[INFO] Logging user
[DEBUG] Updating admin status
Exception while invoking method 'login' TypeError: ldap.getUserGroups(...).filter is not a function
    at MethodInvocation.<anonymous> (packages/wekan-ldap/server/loginHandler.js:185:61)
    at packages/accounts-base/accounts_server.js:462:31
    at tryLoginMethod (packages/accounts-base/accounts_server.js:1291:14)
    at AccountsServer._runLoginHandlers (packages/accounts-base/accounts_server.js:460:22)
    at MethodInvocation.methods.login (packages/accounts-base/accounts_server.js:520:31)
    at MethodInvocation.methodMap.<computed> (packages/mdg:meteor-apm-agent/lib/hijack/wrap_session.js:161:30)
    at packages/check/match.js:118:15
    at Meteor.EnvironmentVariable.EVp.withValue (packages/meteor.js:1234:12)
    at Object._failIfArgumentsAreNotAllChecked (packages/check/match.js:116:43)
    at maybeAuditArgumentChecks (packages/ddp-server/livedata_server.js:1768:18)
    at packages/ddp-server/livedata_server.js:719:19
    at Meteor.EnvironmentVariable.EVp.withValue (packages/meteor.js:1234:12)
    at packages/ddp-server/livedata_server.js:717:46
    at Meteor.EnvironmentVariable.EVp.withValue (packages/meteor.js:1234:12)
    at packages/ddp-server/livedata_server.js:715:46
    at new Promise (<anonymous>)
    at Session.method (packages/ddp-server/livedata_server.js:689:23)
    at packages/mdg:meteor-apm-agent/lib/hijack/wrap_session.js:52:38
    at Meteor.EnvironmentVariable.EVp.withValue (packages/meteor.js:1234:12)
    at Session.sessionProto.protocol_handlers.method (packages/mdg:meteor-apm-agent/lib/hijack/wrap_session.js:51:44)
    at packages/ddp-server/livedata_server.js:559:43

Am I doing something wrong here? I can also give you an output of my compose-docker.yml:

      - LDAP_SYNC_ADMIN_STATUS=true
      - LDAP_SYNC_ADMIN_GROUPS='AdminGroup'

Thanks in advance for any kind of help!