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I receive the following every time I attempt to run a WireShark capture. Anyone know what to do to resolve?

Type: ErrorException
Code: 8
Message: Undefined offset: 0
File: /opt/unetlab/html/includes/api_capture.php
Line: 99

#0 /opt/unetlab/html/includes/api_capture.php(99): Slim\Slim::handleErrors(8, 'Undefined offse...', '/opt/unetlab/ht...', 99, Array)
#1 /opt/unetlab/html/api.php(1568): apiCapture(Object(Lab), Array, '0', Array)
#2 /opt/unetlab/html/includes/Slim/Route.php(468): {closure}(Array)
#3 /opt/unetlab/html/includes/Slim/Slim.php(1357): Slim\Route->dispatch()
#4 /opt/unetlab/html/includes/Slim/Middleware/Flash.php(85): Slim\Slim->call()
#5 /opt/unetlab/html/includes/Slim/Middleware/MethodOverride.php(92): Slim\Middleware\Flash->call()
#6 /opt/unetlab/html/includes/Slim/Middleware/PrettyExceptions.php(67): Slim\Middleware\MethodOverride->call()
#7 /opt/unetlab/html/includes/Slim/Slim.php(1302): Slim\Middleware\PrettyExceptions->call()
#8 /opt/unetlab/html/api.php(2465): Slim\Slim->run()
#9 {main}

you forgot to install dockers

apt update
apt install eve-ng-dockers