adoxus

I don't know how this is triggered but under version 2.5.14 dev does not add related language page IDs to the database. // ensure all languages are loaded and get instantiated versions of system/default languages foreach($languages as $language) { if($language->id == $defaultLanguagePageID) { $this->defaultLanguagePage = $language; } else if($language->name == 'default') { $_default = $language; // backup plan } } if(!$this->defaultLanguagePage) { if($_default) $this->defaultLanguagePage = $_default; else $this->defaultLanguagePage = $languages->getAll()->first(); } $this->defaultLanguagePage->setIsDefaultLanguage(); $languages->setDefault($this->defaultLanguagePage); Wire::setFuel('languages', $languages); /** * Hook before Inputfield::render to set proper default language value * * Only applies to Inputfields that have: useLanguages == true * */ public function hookInputfieldBeforeRender(HookEvent $event) { $inputfield = $event->object; if(!$inputfield->useLanguages) return; $userLanguage = $this->wire('user')->language; if(!$userLanguage) return; // set 'value' attribute to default language values if($userLanguage->id !== $this->defaultLanguagePageID) { $t = $inputfield->trackChanges(); if($t) $inputfield->setTrackChanges(false); $inputfield->attr('value', $inputfield->get('value' . $this->defaultLanguagePageID)); if($t) $inputfield->setTrackChanges(true); } } The error-causing part is checking the defaultLanguagePageID which wasn't automatically added to the modules table for the LanguageSupport class, hence a quick hack, which is manually finding page IDs and entering the correct info into the data field of LanguageSupport class, as follows, temporarily solves the issue and your install starts working again, since it was a fatal error affecting whole system this may be a lifesaver. You'll see something like this: {"otherLanguagePageIDs":[4220]} Find page IDs and change it to this: {"languagesPageID":4181,"defaultLanguagePageID":4182,"otherLanguagePageIDs":[4219],"languageTranslatorPageID":4183} Trying to add another 3rd language triggers the issue again, changing user default language is harmless. Edit: Trying to delete a language clears whole data field.