Error in phpMyAdmin Warning in ./libraries/plugin_interface.lib.php#551

Just edit the plugin _interface.lib.php

sudo nano /usr/share/phpmyadmin/libraries/plugin_interface.lib.php

Find this line

if ($options != null && count($options) > 0) {

Add (array) or replace with this

if ($options != null && count((array)$options) > 0) {

Source : https://stackoverflow.com/questions/55066509/error-in-phpmyadmin-warning-in-libraries-plugin-interface-lib-php551