Unable to Sell Pre-Sale Crypto on PancakeSwap via Binance Web 3 Tab

I bought a pre-sale cryptocurrency on PancakeSwap using the Binance app's web 3 tab, but unfortunately, I'm currently facing difficulties in selling it. I wasn't given any heads up about any problems during the purchase; all I was told was that it was a risky investment. Right now, I'm having trouble selling the cryptocurrency because I keep getting an error message telling me to "increase tolerance." This situation is incredibly exasperating, particularly given the absence of explicit direction or assistance.