Fatal error adding new block

Permalink
This site has been running fine for some time. There have been no edits to it for at least a month. No updates.

With no (apparent) changes to the site, it returns the following error & warning when attempting to add a block. There is no problem editing an existing block on a page.

Did a manual reinstall but that didn't correct the problem.

Any ideas?

Warning: require_once(/var/www/bystanders.org.uk/web/packages/groupdocs_viewer/blocks/groupdocs_viewer/controller.php): failed to open stream: No such file or directory in /var/www/clients/client1/web2/web/concrete/core/libraries/loader.php on line 217
...
Fatal error: require_once(): Failed opening required '/var/www/bystanders.org.uk/web/packages/groupdocs_viewer/blocks/groupdocs_viewer/controller.php' (include_path='/var/www/bystanders.org.uk/web/libraries/3rdparty:/var/www/clients/client1/web2/web/concrete/libraries/3rdparty:.:/usr/share/php:/usr/share/pear') in /var/www/clients/client1/web2/web/concrete/core/libraries/loader.php on line 217

 

This website stores cookies on your computer. These cookies are used to improve your website experience and provide more personalized services to you, both on this website and through other media. To find out more about the cookies we use, see our Privacy Policy.