If you are having an issue with signaling on many sensors then it is more likely an issue with panel placement or the panel itself.
All of your sensors are showing in Alarm.com as 319.5Mhz sensors.
Where is the panel located? Is it near large metal sources?
I would first recommend updating firmware. Your panel is currently on a very old version which may have an impact. Updates will need to be incremental. The first update for your panel would need to be to 4.1.1, then 4.2.1, then 4.3.0, then finally 4.4.2.
The instructions and patch tags needed are in the thread linked below. You may be able to just tap upgrade software and it should automatically find the first couple. But patch tags are typically needed on all newer versions.
One more thing to consider which is specific to the CO Detector, they will report malfunction constantly when expired. CO detectors have a set lifespan and replace by date. Double check that the CO unit is not expired, as that may explain its malfunction frequency. If it is not expired, then signaling would be the cause.