I've moved this thread to Plugin Support. Please be sure to post your threads in the correct forum next time. Thank you.
It would help if you listed what plugins you added when you began getting these errors. However, I see several YEP plugins listed. This is not my area of expertise, but there is a very specific order Yanfly plugins have to be in in the plugin manager in order to function properly. There should be an order list on his website if I'm not mistaken.