There are some quests what are imposible do to server changes or small world or crafting recepies not working so i will list them and some ways to fix them
Quests #77; #78 and #101 need a hidden quest for them to be compeated that hidden quest is #296 Rolling Machine / Implosion Compressor that quest normaly should compeat when eather you compleat quest #158 or when you compleat queast #74
i suggest you do command /bq_adim complete 296 (username) or you can edit the quest book itself and remove the need for that quest in those 3 quests
Quest #46 is impossible cause need Item placeholder what you cant get but i guess you cant really fix it since even in signlepayer you cant do it
but still you could fix it by just adding that placeholder in shop or edditing the quest book itself
Quests #163; #164 and #165 are imposible cause recepies dosnt work and in singleplayer those recepies do work fixing space might fix those 3 quests but not sure
Quest #241 is imposible casue for some reason horse breeding dosnt work and Quest #230 need mushroom cow and i have traveld forever and havnt fount any in the entire server so i suggest just adding spawn eggs in server shop for rare animals like Mules, Mushrooms, Ocelots, Lamas, Polar Bears, Donkeys, Horses
There are Bunch more quest what need accest to different worlds and those worlds are imposbbile to reach since space still isnt fixed
Hope you all can do something about those quests