Polling Error Cisco router 2691

[Eliot54]

Hi all,

I'm using Cacti 1.1.38 to monitor a cisco 2691 router, however the Graphs cannot be displayed correctly. When rebuilding the poller cache I see the following error in the logs :

10/28/2018 11:30:05 - CMDPHP PHP ERROR WARNING Backtrace: (/poller_commands.php: 112 run_data_query)(/lib/data_query.php: 154 update_poller_cache_from_query)(/lib/utility.php: 103 poller_update_poller_cache_from_buffer)(/lib/utility.php: 541 sizeof)(CactiErrorHandler)(/lib/functions.php: 4585 cacti_debug_backtrace)
10/28/2018 11:30:05 - ERROR PHP WARNING: sizeof(): Parameter must be an array or an object that implements Countable in file: /usr/share/cacti/site/lib/utility.php on line: 541

[netniV]

Downgrade PHP to 7.1, 1.1.38 does not support 7.2+