Hi,
Require help to address the Login error issue. Two years back I have installed Moodle 3.6 application and did not face any issue till last evening when students logged in. Yesterday all students were getting Invalid login error messages. Not sure what is wrong with the application.
I have not done any changes in the backend too, but still getting an invalid error.
Appreciate your support to resolve this.
Can the site admin and teachers log in?
Are these students internally authenticated by Moodle ("manual" users):
Or are they authenticated by an external service, for example: LDAP (including Active Directory) or External Database?
You can also check this in the database, for example:
SELECT id, auth, username FROM mdl_user;
+----+--------+--------------------------------------+
| id | auth | username |
+----+--------+--------------------------------------+
| 1 | manual | guest |
| 2 | manual | admin |
| 3 | ldap | boyle |
| 4 | ldap | curie |
| 5 | db | jane |
| 6 | db | elroy |
+----+--------+--------------------------------------+
So the likely causes are:
First test the connection (point 1) by going to Site adminstration ▸ Plugins ▸ Authentication ▸ Manage authentication and clicking Test settings for the LDAP server entry:
It should say "Connecting to your LDAP server was successful".
In fact, point 2 is more likely if you're getting "Invalid login, please try again". Moodle sends the username as the LDAP attribute specified in Moodle in User attribute with the entered password to the LDAP server. So maybe user details or passwords have been changed on the LDAP server.
Also check the config changes report to see if anything has been changed on the Moodle site.
If it's still not working please share the value of your User attribute field and the type of the LDAP server (for example: Active Directory or OpenLDAP).
If LDAP server is "disabled" then no users with authentication method set to LDAP server will be able to log in.
