Both MCCC and Wonderful Whims have been updated for the latest patch. If you are getting last exceptions with MCCC installed, you would also get them without it installed. The mod just lets you know when a last exception occurs. Deaderpool has a discord that can help you figure out what the problem is. It may be another mod or just an issue in game. You can go there and drop the last exception file into the error support section, and they'll help you.
I am not sure about Wonderful Whims. It is working fine for me. Maybe try redownloading?