Error accessing mailbox

[reactivo]

Hi,

The plugin was working in Moodle version 2.6.3+ (Build: 20140619), but suddenly I cannot access to the mailbox.php. It gives me the following errors:

Notice: Trying to get property of non-object in /furanet/sites/campusdes.universidaddepadres.es/web/htdocs/moodle/blocks/jmail/block_jmail_mailbox.class.php on line 95

No se puede encontrar registro de datos en la tabla block_instances de la base de datos.

Más información sobre este error

Debug info: SELECT id,parentcontextid FROM {block_instances} WHERE id IS NULL
[array (
)]
Error code: invalidrecord
Stack trace:
line 1390 of /lib/dml/moodle_database.php: dml_missing_record_exception thrown
line 1366 of /lib/dml/moodle_database.php: call to moodle_database->get_record_select()
line 7245 of /lib/accesslib.php: call to moodle_database->get_record()
line 57 of /blocks/jmail/locallib.php: call to context_block::instance()
line 95 of /blocks/jmail/block_jmail_mailbox.class.php: call to block_jmail_get_context()
line 48 of /blocks/jmail/mailbox.php: call to block_jmail_mailbox->__construct()

I ran the cron.php several times, as this moodle doc suggests http://docs.moodle.org/all/es/error/moodle/invalidrecord, with no luck. Also I have tried uninstalling the plugin and installing it again, but It keeps showing the error.

Can you help me?
Thanks.

[reactivo]

I think it has something to do with changing the default home page to "My moodle". Changing it back to default, purging all cache, running cron, and then changing back the home page to "My moodle" seems to solve it, no more errors showing in mailbox.php.

Maybe it can help someone.

[jleyva]

Please, try with the latest version. I think that this bug is fixed