Unable to login from android Gallery App

[svdstra]

Bug report

I have installed the gallery App and it is working fine in the webbrowser environment.
I also have installed the OC Gallery App on my Android device but whel trying to log in the Android App returns: ERROR Login Failed because the username and/or password is wrong. However the username and password are 100% correct

Steps to reproduce

1. Test Owncloud gallery App in Owncloud in web environment: OK
2. Install Owncloud gallery from Google Drive on Android Device: OK
   Fill out serveraddress, username and password in Android App: RROR Login Failed because the username and/or password is wrong

Expected behaviour

Logging in and connecting to Gallery

Actual behaviour

ERROR Login Failed because the username and/or password is wrong

Server configuration

Operating system: Ubuntu 16.04
Web server: Apache
Database: MySQL Ver 14.14 Distrib 5.7.20
PHP version: 7.0.22
cloud server: ownCloud
cloud version: 9.1.6

Updated from an older installation or fresh install: Fresh

List of activated apps:

Galery 15.0.0

The content of config/config.php:
{
"system": {
"updatechecker": false,
"instanceid": "oc82d6rcprrx",
"passwordsalt": "REMOVED SENSITIVE VALUE",
"secret": "REMOVED SENSITIVE VALUE",
"trusted_domains": [
"192.168.0.6",
"owncloud.mydomain.com"
],
"datadirectory": "/var/www/owncloud/data",
"overwrite.cli.url": "http://192.168.0.6/owncloud",
"dbtype": "mysql",
"version": "9.1.6.2",
"dbname": "Owncloud",
"dbhost": "localhost",
"dbtableprefix": "oc_",
"dbuser": "REMOVED SENSITIVE VALUE",
"dbpassword": "REMOVED SENSITIVE VALUE",
"logtimezone": "UTC",
"installed": true,
"mail_from_address": "apps",
"mail_smtpmode": "smtp",
"mail_domain": "xxxxxxxxxxx",
"mail_smtphost": "smtp.gmail.com",
"mail_smtpport": "485",
"mail_smtpauthtype": "LOGIN",
"mail_smtpauth": 1,
"mail_smtpname": "REMOVED SENSITIVE VALUE",
"mail_smtppassword": "REMOVED SENSITIVE VALUE",
"mail_smtpsecure": "ssl",
"appstore.experimental.enabled": true
}
}

Are you using external storage, if yes which one: local folder, smb share, sftp, etc.
smb share

Are you using encryption:
No

Are you using custom gallery.cnf config files:
No