Why can't I swap on PancakeSwap?

I'm curious to understand, why is it that I'm unable to conduct a swap on PancakeSwap? I've checked my wallet balance and ensured that I have sufficient funds for the transaction. However, when I attempt to initiate the swap, I'm encountering an error message. Could it be due to a technical issue with the platform? Or perhaps, is there a specific requirement or step that I'm missing? I've also heard about slippage tolerance and gas fees, but I'm not entirely sure how they might affect my ability to swap. Clarifying these points would greatly assist me in resolving the issue.