I failed to invoke my inherent skill, but still cannot invoke it for another 24 hours regardless. Log follows:

<50%hp 100%m 29%mv 2095tnl>
You concentrate upon the earth and turn your skin to stone.
You fail to invoke your inherent ability.

<50%hp 81%m 29%mv 2095tnl> !
You cannot use your stone skin ability for another 24 hours.

<50%hp 81%m 29%mv 2095tnl> af
You are affected by:
Commune: 'bless'.
Commune: 'bless'.