Cannot share gallery folder as external link

[brb6708]

Bug report

Steps to reproduce

1. open a folder containing images in gallery
2. click "Share"
3. click "share Link"
4. enter password

Expected behaviour

Actual behaviour

Server configuration

Operating system:
Linux (Ubuntu 16.04)
Web server:
Apache 2

Database:
MySQL
PHP version:
5.6
cloud server: Nextcloud or ownCloud
ownCloud
cloud version: (see admin page or version.php)
10.0.10
Updated from an older installation or fresh install:
updated
List of activated apps:

App list

Enabled:

• calendar: 1.6.0
• comments: 0.3.0
• configreport: 0.1.1
• contacts: 1.5.4
• dav: 0.4.0
• external: 1.2
• federatedfilesharing: 0.3.1
• federation: 0.1.0
• files: 1.5.1
• files_external: 0.7.1
• files_sharing: 0.11.0
• files_trashbin: 0.9.1
• files_versions: 1.3.0
• files_videoplayer: 0.9.8
• gallery: 16.1.0
• market: 0.2.5
• notifications: 0.3.5
• onlyoffice: 2.1.1
• polls: 0.8.1
• provisioning_api: 0.5.0
• updatenotification: 0.2.1
• wallpaper: 0.1
  Disabled:
• encryption
• firstrunwizard
• richdocuments
• systemtags
• user_external

The content of config/config.php:

Config report

Are you using external storage, if yes which one: local folder, smb share, sftp, etc.
no

Are you using encryption: yes/no
no

Are you using custom gallery.cnf config files: yes/no
no

Web server error log

Web server error log

nothing extraordinary

Cloud log

Cloud log

nothing gallery related

Client configuration

Browser:
Chrome
Operating system:
Linux Ubuntu 16.04

Browser log

Browser log

VM2006:1 PUT https://cloud.csa-gmbh.com/ocs/v2.php/apps/files_sharing/api/v1/shares/undefined?format=json 404 (Not Found)
share.js?v=e8c7a2863…da54ef0371ad4f:1112 Uncaught TypeError: Cannot read property 'message' of undefined
at Object. (share.js?v=e8c7a2863…da54ef0371ad4f:1112)
at j (jquery.js:3099)
at Object.fireWith [as rejectWith] (jquery.js:3211)
at x (jquery.js:8266)
at XMLHttpRequest. (jquery.js:8605)

[roerch]

I do observe the same problem here. However the owncloud.log file is a bit more talkative. The issue seems to boil down to this line where an 'undefined' is sent in a query for 'id' where an integer would be expected:
{"reqId":"XPeQSH8AAQEAAEX9IoQAAAAK","level":3,"time":"2019-06-05T09:50:01+00:00","remoteAddr":"XXX.XXX.XXX.XXX","user":"XXX","app":"PHP","method":"PUT","url":"/owncloud/ocs/v2.php/apps/files_sharing/api/v1/shares/undefined?format=json","message":"Doctrine\DBAL\Exception\DriverException: An exception occurred while executing 'SELECT * FROM "oc_share" WHERE ("id" = ?) AND ("share_type" IN (?, ?, ?)) AND (("item_type" = ?) OR ("item_type" = ?))' with params ["undefined", 0, 1, 3, "file", "folder"]:\n\nSQLSTATE[22P02]: Invalid text representation: 7 ERROR: invalid input syntax for integer: "undefined" at /usr/src/owncloud/lib/composer/doctrine/dbal/lib/Doctrine/DBAL/Driver/AbstractPostgreSQLDriver.php#91"}