Hiya! I am also loving the game but I am having the same issue persist. I have progressed past recruiting lyriel and cannot seem to get the eager student chp. 4 mission to progress.
https://mega.nz/file/IKIgzY7L#blkSU1Kpu-UlSAjccCnpwYMgRWqduLDILIvcTjBROUw
I've uploaded the save here if you could help me 🙏