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Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can 
Nextcloud version : 10.0.6 Stable
Operating system and version: Ubuntu 16.04
Apache or nginx version (eg, Apache 2.4.25): apache 2.4.18
PHP version (eg, 7.1): 7.0.33
The issue you are facing:
We use LDAP integration to allow users to login with their AD username and password. This works but once the user changes their password the NextCloud client asks for a new username and password in a webpage which does not seem to update the client credentials. The client status changes from disconnected to connecting to … but it never manages to sign in again.
Is this the first time you’ve seen this error? (Y/N): Y, but this is a migration from Owncloud to Nextcloud and the first time users are needing to change passwords
Steps to replicate it:
- User is prompted to update his password by windows
- User changes password
- After login NextCloud client gives a popup (like OC used to) but asks for both username and password in a new window (instead of just a password update like owncloud did.)
- User enters username and new password, and is logged into the Nextcloud instance instead of the client being updated.
- User is never able to update the password
- Client remains disconnected
The output of your Nextcloud log in Admin > Logging:
Info core Bruteforce attempt from "x.x.0.1" detected for action "login". 2019-03-12T07:15:30+00:00 --
Warning core Login failed: 'sharlv' (Remote IP: '192.168.0.1') 2019-03-12T07:15:30+00:00 --
Warning user_ldap Bind failed: 49: Invalid credentials 2019-03-12T07:15:30+00:00 --
Error index Exception: {"Exception":"OC\\PreviewNotAvailableException","Message":"SVG mimetype cannot be rendered","Code":0,"Trace":"#0 \/var\/www\/owncloud\/lib\/private\/Preview.php(809): OC\\Preview->getMimeIcon()\n#1 \/var\/www\/owncloud\/core\/ajax\/preview.php(66): OC\\Preview->showPreview()\n#2 \/var\/www\/owncloud\/lib\/private\/Route\/Route.php(155) : runtime-created function(1): require_once('\/var\/www\/ownclo...')\n#3 [internal function]: __lambda_func(NULL)\n#4 \/var\/www\/owncloud\/lib\/private\/Route\/Router.php(293): call_user_func('\\x00lambda_268', Array)\n#5 \/var\/www\/owncloud\/lib\/base.php(998): OC\\Route\\Router->match('\/core\/preview.p...')\n#6 \/var\/www\/owncloud\/index.php(48): OC::handleRequest()\n#7 {main}","File":"\/var\/www\/owncloud\/lib\/private\/Preview.php","Line":1188} 2019-03-12T07:03:11+00:00 2CB728B4-9686-431B-AA7B-4D1BE75C78FC
Info core Bruteforce attempt from "x.x.0.1" detected for action "login". 2019-03-12T06:57:25+00:00 --
Error index Exception: {"Exception":"OC\\PreviewNotAvailableException","Message":"SVG mimetype cannot be rendered","Code":0,"Trace":"#0 \/var\/www\/owncloud\/lib\/private\/Preview.php(809): OC\\Preview->getMimeIcon()\n#1 \/var\/www\/owncloud\/core\/ajax\/preview.php(66): OC\\Preview->showPreview()\n#2 \/var\/www\/owncloud\/lib\/private\/Route\/Route.php(155) : runtime-created function(1): require_once('\/var\/www\/ownclo...')\n#3 [internal function]: __lambda_func(NULL)\n#4 \/var\/www\/owncloud\/lib\/private\/Route\/Router.php(293): call_user_func('\\x00lambda_268', Array)\n#5 \/var\/www\/owncloud\/lib\/base.php(998): OC\\Route\\Router->match('\/core\/preview.p...')\n#6 \/var\/www\/owncloud\/index.php(48): OC::handleRequest()\n#7 {main}","File":"\/var\/www\/owncloud\/lib\/private\/Preview.php","Line":1188} 2019-03-12T07:03:11+00:00 2CB728B4-9686-431B-AA7B-4D1BE75C78FC
Info core Bruteforce attempt from "x.x.0.1" detected for action "login". 2019-03-12T06:57:25+00:00 --
Warning core Login failed: 'sharlv' (Remote IP: '0.1') 2019-03-12T06:57:25+00:00 --
Warning user_ldap Bind failed: 49: Invalid credentials 2019-03-12T06:57:25+00:00 --
Info core Bruteforce attempt from "x.x.0.1" detected for action "login". 2019-03-12T06:55:54+00:00 --
Warning core Login failed: 'sharlv' (Remote IP: '.0.1') 2019-03-12T06:55:54+00:00 --
Warning user_ldap Bind failed: 49: Invalid credentials 2019-03-12T06:55:54+00:00 --
Info core Bruteforce attempt from "x.x.0.1" detected for action "login". 2019-03-12T06:51:47+00:00 --
Warning core Login failed: 'sharlv' (Remote IP: '0.1') 2019-03-12T06:51:47+00:00 --
Warning user_ldap Bind failed: 49: Invalid credentials
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
PASTE HERE
The output of your Apache/nginx/system log in /var/log/____:
PASTE HERE