@nikelaos I did an uninstall of plugin v 2.14.0 and installed v 2.13.3 – older versions are available here:
https://github.com/sheabunge/code-snippets/releases
Before you uninstall the plugin make sure that the option “complete uninstall” is NOT checked in the settings (/wp-admin/network/admin.php?page=snippets-settings) so that snippets will be kept.