The error message is: underlying transaction reverted, so maybe there is something wrong for the action you are trying to execute, if possible, you can share the target contract and function at here,
here is the target contract treasury.sol of which function releaseFunds we are trying to execute through timelockcontroller
This function, releaseFunds(), looks like simple enough, so is there a test case or maybe you can share the failed tx hash, want to know what your steps are?