Use something that's slightly low in N but don't completely back off. Whatever you're currently using should be good but go down a few doses.
Less is more. Or KISS
Well we do not know the ph of the water you currently use since it'll vary from area to area. Add molasses to that and it can swing the ph into a value that inhibits nutrient uptake.
While technically the nutes you use are organic. They're in a ready use state for your plants. Similar to...
If you are using synthetic ferts, the addition of molasses you used caused the ph to swin and give you nute lockout. What is the combined NPK value of the ferts you're using? If you're close to flowering you still retain N but at a lower dose and raise P and K a bit.
As a future guideline:
1)...
Here's an idea..... Are you growing outdoor?... Do you have trees near your grow? If so, do any of the trees outside have that same Amber? Sticky? Might be tree sap
Honestly there are a lot of factors that go into it. There is no one best answer. I know most ppl want to grow a killer strain and want the shortcut answer, but it's a fucking plant man. You're the mad scientist. Experiment with it. Every strain is different and sometimes you hit a completely...