Additional uncaught exception thrown while handling exception

Ik ben bezig met een website op een locale computer (Mac + MAMP)
Sinds gisteren krijg ik een hele vervelende foutmelding als ik sommige (!) pagina's probeer te bewerken (Zie onderstaand)
Ik begrijp er niks van. Ik heb geen dingen veranderd.
Ik heb wel gezocht op Engelstalige oplossingen, maar daar begreep ik niet veel van. Heeft iemand een idee ?

Het gebeurt alleen bij pagina's die een menulink hebben !
Ook als ik een nieuwe pagina aanmaak met een menulink.
Vreemd...

In de log kom ik de volgende foutmelding tegen "
"Error sending content token "lWEKgIwcNqs3b_JZATW818nnyw-raJPrA1QvAjr7cjM" to the Node.js server: [-61] Connection refused"

Dit is dus de foutmelding waar het in hoofdzaak over gaat :

Additional uncaught exception thrown while handling exception.
Original

PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: SELECT s.lid, t.translation, s.version FROM {locales_source} s LEFT JOIN {locales_target} t ON s.lid = t.lid AND t.language = :language WHERE s.source = :source AND s.context = :context AND s.textgroup = 'default'; Array ( [:language] => nl [:source] => Configure how content input by users is filtered, including allowed HTML tags. Also allows enabling of module-provided filters. [:context] => ) in locale() (line 676 of /Applications/MAMP/htdocs/drupal/modules/locale/locale.module).
Additional

PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: INSERT INTO {watchdog} (uid, type, message, variables, severity, link, location, referer, hostname, timestamp) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4, :db_insert_placeholder_5, :db_insert_placeholder_6, :db_insert_placeholder_7, :db_insert_placeholder_8, :db_insert_placeholder_9); Array ( [:db_insert_placeholder_0] => 1 [:db_insert_placeholder_1] => php [:db_insert_placeholder_2] => %type: !message in %function (line %line of %file). [:db_insert_placeholder_3] => a:6:{s:5:"%type";s:12:"PDOException";s:8:"!message";s:495:"SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: SELECT s.lid, t.translation, s.version FROM {locales_source} s LEFT JOIN {locales_target} t ON s.lid = t.lid AND t.language = :language WHERE s.source = :source AND s.context = :context AND s.textgroup = 'default'; Array ( [:language] => nl [:source] => Configure how content input by users is filtered, including allowed HTML tags. Also allows enabling of module-provided filters. [:context] => ) ";s:9:"%function";s:8:"locale()";s:5:"%file";s:61:"/Applications/MAMP/htdocs/drupal/modules/locale/locale.module";s:5:"%line";i:676;s:14:"severity_level";i:3;} [:db_insert_placeholder_4] => 3 [:db_insert_placeholder_5] => [:db_insert_placeholder_6] => http://localhost:8888/drupal/node/20/edit?destination=admin%2Fcontent& [:db_insert_placeholder_7] => http://localhost:8888/drupal/ [:db_insert_placeholder_8] => 127.0.0.1 [:db_insert_placeholder_9] => 1327865079 ) in dblog_watchdog() (line 157 of /Applications/MAMP/htdocs/drupal/modules/dblog/dblog.module).