Hi,
This error is in the release notes for your IAP code version:
Error ID
341132
Check sum error for AP-[ip:%s], slave [s_sum:%u] vs master [m_sum:%u].
Description: AP is checking configuration.
This is certainly not expected behaviour in a fully working environment.
Might be worth backing up the configuration on the virtual controller, then reboot it.
That way another AP will take over as the master.
You could then make a change to the config and saved it, then check again for the error.
This will take the current master IAP out of the equation and help you narrow down what's causing the issue,
Cheers
James