Error message

• Deprecated function: Return type of DateObject::__wakeup() should either be compatible with DateTime::__wakeup(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in include_once() (line 143 of /web/htdocs/www.yogain.it/home/forum/modules/date/date_api/date_api.module).
• Deprecated function: Return type of DateObject::format($format, $force = false) should either be compatible with DateTime::format(string $format): string, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in include_once() (line 143 of /web/htdocs/www.yogain.it/home/forum/modules/date/date_api/date_api.module).
• Deprecated function: Return type of DateObject::setTimezone($tz, $force = false) should either be compatible with DateTime::setTimezone(DateTimeZone $timezone): DateTime, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in include_once() (line 143 of /web/htdocs/www.yogain.it/home/forum/modules/date/date_api/date_api.module).
• Warning: Undefined array key "adaptivetheme_subtheme" in drupal_theme_initialize() (line 100 of /web/htdocs/www.yogain.it/home/forum/includes/theme.inc).
• Warning: Attempt to read property "filename" on null in _drupal_theme_initialize() (line 146 of /web/htdocs/www.yogain.it/home/forum/includes/theme.inc).
• Deprecated function: dirname(): Passing null to parameter #1 ($path) of type string is deprecated in _drupal_theme_initialize() (line 146 of /web/htdocs/www.yogain.it/home/forum/includes/theme.inc).
• Warning: Attempt to read property "name" on null in _theme_load_registry() (line 335 of /web/htdocs/www.yogain.it/home/forum/includes/theme.inc).
• User warning: The following theme is missing from the file system: adaptivetheme_subtheme. For information about how to fix this, see the documentation page. in _drupal_trigger_error_with_delayed_logging() (line 1184 of /web/htdocs/www.yogain.it/home/forum/includes/bootstrap.inc).
• Deprecated function: dirname(): Passing null to parameter #1 ($path) of type string is deprecated in drupal_get_path() (line 2970 of /web/htdocs/www.yogain.it/home/forum/includes/common.inc).
• Deprecated function: Return type of RulesRecursiveElementIterator::hasChildren() should either be compatible with RecursiveIterator::hasChildren(): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in include_once() (line 2088 of /web/htdocs/www.yogain.it/home/forum/modules/rules/includes/rules.core.inc).
• Deprecated function: Return type of RulesRecursiveElementIterator::getChildren() should either be compatible with RecursiveIterator::getChildren(): ?RecursiveIterator, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in include_once() (line 2088 of /web/htdocs/www.yogain.it/home/forum/modules/rules/includes/rules.core.inc).
• Deprecated function: Return type of RulesContainerPlugin::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in include_once() (line 2102 of /web/htdocs/www.yogain.it/home/forum/modules/rules/includes/rules.core.inc).
• Warning: Undefined array key "adaptivetheme_subtheme" in theme_get_setting() (line 1440 of /web/htdocs/www.yogain.it/home/forum/includes/theme.inc).