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[Lilian HUGUES <lilian.hugues@xxxxxxxxx>]

Hi Robert,
Many thanks for your diagnose.
It is exactly the issue, it happens when the grouphomepage for the group does not exist. If we manually create one in the base, it fixes the issue.
Actually, the issue is when a user creates a new group.
It show the message : 
"
Medzone.fr: Site unavailable
Something in the way you're interacting with Medzone.fr is causing an error.
Details if any, follow:

User with id "0" is not known"

The group is however created but without any grouphomepage. Moreover, if
we want to reenter in the parameters of the groupe, it drives us to a
error 500.

Do you have any idea to fix it ?

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https://bugs.launchpad.net/bugs/1632717

Title:
  Bugs after updating Mahara

Status in Mahara:
  Incomplete

Bug description:
  Hello,

  After the update to the latest version of Mahara (16.04) I have
  problems with the display pages of the groups.

  Here is an example :

  [WAR] 1b (lib/group.php:2338) Trying to get property of non-object
  Call stack (most recent first):

      log_message(string(size 36), integer, true, true, string(size 53), integer) at /mypath/maha/lib/errors.php:513
      error(integer, string(size 36), string(size 53), integer, array(size 2)) at /mypath/maha/lib/group.php:2338
      group_get_homepage_view(string(size 2)) at /mypath/maha/lib/view.php:5734
      View->display_author() at /mypath/maha/view/view.php:362

  [WAR] 1b (lib/errors.php:820) Failed to get a recordset: mysqli error: [1452: Cannot add or update a child row: a foreign key constraint fails ("mybdd"."view", CONSTRAINT "view_ibfk_7" FOREIGN KEY ("type") REFERENCES "view_type" ("type"))] in EXECUTE("INSERT INTO "view" ("ctime", "mtime", "atime", "copynewuser", "anonymise") VALUES ('2016-10-12 15:32:22', '2016-10-12 15:32:22', '2016-10-12 15:32:22', 0, 0)")
  Command was: INSERT INTO "view" ("ctime", "mtime", "atime", "copynewuser", "anonymise") VALUES (?, ?, ?, ?, ?) and values was (ctime:2016-10-1215:32:22,mtime:2016-10-1215:32:22,atime:2016-10-1215:32:22,copynewuser:0,anonymise:0)
  Call stack (most recent first):

      log_message(string(size 618), integer, true, true) at /mypath/maha/lib/errors.php:95
      log_warn(string(size 618)) at /mypath/maha/lib/errors.php:820
      SQLException->__construct(string(size 618)) at /mypath/maha/lib/dml.php:1088
      insert_record(string(size 4), object(stdClass), string(size 2), true) at /mypath/maha/lib/view.php:728
      View->commit() at /mypath/maha/lib/view.php:702
      View->__destruct() at /mypath/maha/view/view.php:362
      View->display_author() at /mypath/maha/view/view.php:362

  [WAR] 1b (lib/dml.php:1088) Failed to get a recordset: mysqli error: [1452: Cannot add or update a child row: a foreign key constraint fails ("mybdd"."view", CONSTRAINT "view_ibfk_7" FOREIGN KEY ("type") REFERENCES "view_type" ("type"))] in EXECUTE("INSERT INTO "view" ("ctime", "mtime", "atime", "copynewuser", "anonymise") VALUES ('2016-10-12 15:32:22', '2016-10-12 15:32:22', '2016-10-12 15:32:22', 0, 0)")
  Command was: INSERT INTO "view" ("ctime", "mtime", "atime", "copynewuser", "anonymise") VALUES (?, ?, ?, ?, ?) and values was (ctime:2016-10-1215:32:22,mtime:2016-10-1215:32:22,atime:2016-10-1215:32:22,copynewuser:0,anonymise:0)
  Call stack (most recent first):

      insert_record(string(size 4), object(stdClass), string(size 2), true) at /mypath/maha/lib/view.php:728
      View->commit() at /mypath/maha/lib/view.php:702
      View->__destruct() at /mypath/maha/view/view.php:362
      View->display_author() at /mypath/maha/view/view.php:362

  Untitled
  Mywebsite Mahara : Site unavailable
  A nonrecoverable error occurred. This probably means you have encountered a bug in the system

  Thank you for your help.

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