Bonk. Something funky happened. Vanilla Default MEGA theme

Very nice theme pack, thank you. My only problem is whenever I apply a new style I get the "Bonk Something funky happened. Please bear with us while we iron out the kinks." Error. The style still applies okay, I just have to reload the home page to see it applied so it's not a big problem.
The only unusual thing I'm doing is running the site via https so maybe it's something there?
The only unusual thing I'm doing is running the site via https so maybe it's something there?
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Unable to write to config file '/var/www/forum/conf/locale-en-CA.php' when saving.
The error occurred on or near: /var/www/forum/library/core/class.configuration.php
372: if ($File == '')
373: trigger_error(ErrorMessage('You must specify a file path to be saved.', 'Configuration', 'Save'), E_USER_ERROR);
374:
375: if (!is_writable($File))
376: throw new Exception(sprintf(T("Unable to write to config file '%s' when saving."),$File));
377:
378: if($Group == '')
379: $Group = $this->CurrentGroup;
380:
Backtrace:
[/var/www/forum/library/core/class.locale.php:87] Gdn_Configuration->Save();
[/var/www/forum/applications/dashboard/controllers/class.settingscontroller.php:538] Gdn_Locale->SaveTranslations();
[/var/www/forum/library/core/class.dispatcher.php:270] SettingsController->ThemeOptions();
[/var/www/forum/index.php:38] Gdn_Dispatcher->Dispatch();
however, does anyone know what the files in \compile do?