Fatal error: Uncaught Error: Call to a member function using_index_permalinks() on null in /var/www/html/wp-includes/rest-api.php:516
Stack trace:
#0 /var/www/html/wp-content/plugins/etrans-medtools/wc-medtools.php(27): get_rest_url(NULL, '/wc/v3')
#1 /var/www/html/wp-content/plugins/etrans-medtools/wc-medtools.php(534): ETransMedTools_Plugin->__construct()
#2 /var/www/html/wp-settings.php(560): include_once('/var/www/html/w...')
#3 /var/www/html/wp-config.php(139): require_once('/var/www/html/w...')
#4 /var/www/html/wp-load.php(50): require_once('/var/www/html/w...')
#5 /var/www/html/wp-blog-header.php(13): require_once('/var/www/html/w...')
#6 /var/www/html/index.php(17): require('/var/www/html/w...')
#7 {main}
  thrown in /var/www/html/wp-includes/rest-api.php on line 516