Fixed Moodle install error by renaming trema.scss to default.scss.

db/upgrade.php

@@ -52,7 +52,14 @@ function xmldb_theme_trema_upgrade($oldversion): bool {
             }
         }
 
-        upgrade_plugin_savepoint(true, 2024040100, 'theme', 'trema');
+        if ($oldversion < 2024042300) {
+            // Renamed trema.scss to default.scss.
+            if (get_config('theme_trema', 'preset') == 'trema.scss') {
+                set_config('preset', 'default.scss', 'theme_trema');
+            }
+        }
+
+        upgrade_plugin_savepoint(true, 2024042300, 'theme', 'trema');
     }
 
     return true;

lib.php

@@ -257,7 +257,7 @@ function theme_trema_get_main_scss_content($theme) {
 
     $scss = '';
 
-    $filename = !empty($theme->settings->preset) ? $theme->settings->preset : 'trema.scss';
+    $filename = !empty($theme->settings->preset) ? $theme->settings->preset : 'default.scss';
     $scss .= file_get_contents("$CFG->dirroot/theme/trema/scss/preset/{$filename}");
 
     if (!empty($theme->settings->enabletrematopics)) {

settings/general_settings.php

@@ -43,9 +43,9 @@
 $name = 'theme_trema/preset';
 $title = get_string('preset', 'theme_boost');
 $description = get_string('preset_desc', 'theme_boost');
-$default = 'trema.scss';
+$default = 'default.scss';
 // These are the built in presets.
-$choices = ['trema.scss' => 'trema.scss', 'plain.scss' => 'plain.scss'];
+$choices = ['default.scss' => 'default.scss', 'plain.scss' => 'plain.scss'];
 $setting = new admin_setting_configthemepreset($name, $title, $description, $default, $choices, 'trema');
 $setting->set_updatedcallback('theme_reset_all_caches');
 $page->add($setting);