Error: Invalid argument supplied for foreach()

#0 /var/www/vhosts/prinzsrl.it/httpdocs/_app/prinz/client.php(230): tdz_exception_error_handler(2, 'Invalid argumen...', '/var/www/vhosts...', 230, Array)
#1 /var/www/vhosts/prinzsrl.it/httpdocs/_cache/@/php/_app@prodotto@prodotto.php(122): tdz\local\request->articoli_m(Array)
#2 /var/www/vhosts/prinzsrl.it/httpdocs/_app/catalogo/catalogo.php(221): tdz\local\prodotto->on_get(Array)
#3 /var/www/vhosts/prinzsrl.it/httpdocs/_app/catalogo/catalogo.php(21): tdz\local\catalogo->load(Array)
#4 /var/www/vhosts/prinzsrl.it/httpdocs/_tdz/_app/service/service.php(436): tdz\local\catalogo->on_get(Array)
#5 /var/www/vhosts/prinzsrl.it/httpdocs/_tdz/_app/service/service.php(346): tdz\service->_execute()
#6 /var/www/vhosts/prinzsrl.it/httpdocs/_tdz/_app/service/service.php(331): tdz\service->http()
#7 /var/www/vhosts/prinzsrl.it/httpdocs/_tdz/_app/tdz.php(387): tdz\service->http()
#8 /var/www/vhosts/prinzsrl.it/httpdocs/_tdz/_app/tdz.php(754): tdz\tdz->__construct()
#9 /var/www/vhosts/prinzsrl.it/httpdocs/index.php(10): require_once('/var/www/vhosts...')
#10 {main}