500 Server Error After change themes in back office

[Pablo]

Hello guys,

i just installed Prestashop 2 days ago and i have this issue after i want to change my default themes 

Any help please?

[joseantgv]

Turn on debug mode https://www.prestashop.com/forums/topic/575132-how-to-enable-debug-mode-on-prestashop-17-and-older-versions-turn-on-error-reporting-blank-page/

[Pablo]

51 minutes ago, joseantgv said:

Turn on debug mode https://www.prestashop.com/forums/topic/575132-how-to-enable-debug-mode-on-prestashop-17-and-older-versions-turn-on-error-reporting-blank-page/

 

Hey thanks for that, now i have this issue and i dont know how fix this

 

112. /* Initialize the current Shop */
113. try {
114.     $context->shop = Shop::initialize();
115.     $context->theme = new Theme((int)$context->shop->id_theme);
116.     if ((Tools::isEmpty($theme_name = $context->shop->getTheme()) || !Validate::isLoadedObject($context->theme)) && !defined('_PS_ADMIN_DIR_')) {
117.         throw new PrestaShopException(Tools::displayError('Current theme unselected. Please check your theme configuration.'));
118.     }
119. } catch (PrestaShopException $e) {
120.     $e->displayMessage();
121. }
122. define('_THEME_NAME_', $theme_name);