Plants do NOT uptake sugar ever. Sugar only feeds bacteria in the root zone.
You a betting man? Or exclusively misejucated? [REDACTED].
OP i bet your roots have went insane and sucked all the nutes out your potting mix. Modern fake Cali breeder genetics will do that. I've went to toss lots of stuff that damped off after a week or two only to find 3 months worth of roots bound up under the dam thing and pointed to the sky. Your potting mix must be really light.
Dont feed your plant sugar it enters the root and the plant stops making its own.