These messages were added in a recent plugin update. To solve the 'Mainloop tick interval out of range' error I had to reduce the polling frequency in the hicon plugin from 100 to down to something like 75. For the Warning message I'm not sure this is an issue as the loop interval is less than the polling frequency - this tells me everything is being done in the right amount of time.
I haven't seen the StepGen error before, maybe linked to the above issue with polling frequency being too high? Was it a following error limit? Do you have the feedback set to 'Undefined' in the hicon plugin?