Hello! This may have been answered, but I can not find the answer for the life of me! So apologies in advanced if this has been answered.

I'm playing Modern Skyblock 3 right now (I also had the same issue on StoneBlock) which uses your BQ Mod. Everytime I complete a quest, I have to back out of the quest and the click to back into it to actually claim the Loot Chest. Now that I think about it, it's only LootChests I have a problem with. If it's a regular reward, the claim button lights up normally.

The button will also light up normally if there's multiple steps to complete. For example "Collect 9 cobble stone" then click the arrow to go to the second quest "make compressed cobble". When I complete those and click the arrow, the claim button will light up.

Perhaps it's my PC, but I don't know.

Do you know which version of BQ and Standard Expansion is installed?

First, those are several versions out of date. Second, that's an experimental version of the Quest Book that shouldn't even be in a release pack (frankly it should be crashing becase the base mod doesn't support it)