For Ayumi's favor, are you able to invite her to your bedroom, and is she in the war room? If you can invite her, and she is in the war room, then the quest is complete, but is just not being marked as complete in the journal. If this is the case, I'll make a fix for that in the next version.
Most of those other quests progress naturally as you complete other quests. The only ones that don't are unexpected meeting, and Divine assistance. For divine assistance, talk to 5 people at high levels of compliance in Hypatia. There's one in the church, two just outside the church, one in the royal district, and one in the commercial district. If you can't progress, it's likely that one of your compliance levels for Hypatia isn't high enough. Some people have reported a bug where their game skips giving them a compliance point after updating, so if you've done everything, and can't progress, post your save, and I'll see if there's a bug preventing you from progressing. For unexpected meeting, if you're on the part where you can help Ferox, there are four things to help him with. There's an abandoned camp just outside his cave, supplies in the bottom right side of the same map that you can give to the human with the other supplies in his cave, an orc in Derugial's center you can kill if you keep talking to him, and documents in Yuma's room.
If it's the type of freeze where the audio still works, but the image is frozen, then that's an issue with the way the RPG maker MV engine and your system interact, rather than with this game specifically. If that's the case, and that fix doesn't work, then I'm not sure what else I can do. I'll see if I can find any other fixes for this, and let you know. If it's not that type of freeze, then describe it, and I'll see if it's a different issue.
Can you post a save from just before that message shows up?
How have you been updating your game? Have you been overwriting older files with new ones, or copying your save folder to the new version? I tested your save on a fresh install of V0.2.14, and the new quests unlocked the moment I stepped into the meeting room in Hypatia.
If you overwrote old files, that method of updating is a common cause of a few bugs, and not something I would recommend. Using a fresh install, and copying your save folder to the new version is typically the safer method of updating. It's also possible that when you were extracting the zip folder, something became corrupted, and caused this issue.
Like I said, your save worked on a fresh install of V0.2.14, so try using a fresh download/install of it, copying your save folder over to that version, and try using that save again. Let me know if this works.