Error messages without changing anything

Got this email this morning:

A new trackback on the post “Survival at Sea” is waiting for your approval
https://askalodge.net/survival/

Website: Google (IP: 188.72.108.22, 188.72.108.22)
URL: http://www.google.com/tlrxsuhh
Trackback excerpt:
Google

Please take a look at the websites we comply with, such as this 1, as it represents our picks through the web.

Approve it: https://askalodge.net/wp-admin/comment.php?action=approve&c=6
Trash it: https://askalodge.net/wp-admin/comment.php?action=trash&c=6
Spam it: https://askalodge.net/wp-admin/comment.php?action=spam&c=6
Currently 1 comment is waiting for approval. Please visit the moderation panel:
https://askalodge.net/wp-admin/edit-comments.php?comment_status=moderated

Then the following at the head of my website:

And can no longer access the admin section

Warning: session_start(): open(/tmp/sess_4b79a9b9251554463e3041f59b83fd7e, O_RDWR) failed: Disk quota exceeded (122) in /home/aska/public_html/wp-content/plugins/wp-clone-template/main.php on line 119

Warning: session_start(): Cannot send session cache limiter – headers already sent (output started at /home/aska/public_html/wp-content/plugins/wp-clone-template/main.php:119) in /home/aska/public_html/wp-content/plugins/wp-clone-template/main.php on line 119

Warning: Cannot modify header information – headers already sent by (output started at /home/aska/public_html/wp-content/plugins/wp-clone-template/main.php:119) in /home/aska/public_html/wp-content/plugins/wp-easycart/inc/ec_config.php on line 32