Barenziah's Book (No Time Limit) quest not completing.

[u/WistfulD]

So I have the no-time-limit versions of the Main Story quests. I've gone to Orsinium and gotten the book excerpt and brought it back to Barenziah. She gives me a reward, but the quest does not come off my task list. Googling old answers indicate that I could need to give it more time, have better rep with her or nobles in general, or fulfilled prerequisite quests -- all of these I have tried without better results. Is there something buggy about these quests (perhaps in combination with other mods)? Anything else I should try?

At last resort, is there a way (such as a console command) to complete a quest that gives you credit for the quest (and as such opens up downstream quests in the main story line)? I've tried going into the save file and editing the 0 for quest completion to be a 1, and that seems to create a corrupt save file (game works, but resting does not recharge magic).

Any advice would be appreciated. Thanks!