I Face Transaction Errors After Sending WETH on Uniswap BNB Chain

I transferred 0.021 WETH to Uniswap through the BNB Chain, but I cannot make any transactions. I am unable to purchase any coins or even transfer my balance. Each time I try, the system shows the error message: “You don’t have enough BNB to cover the Network cost.” Since I am not very experienced with these processes, I am unsure whether I need an additional bridge or another step to complete the transaction. This situation is frustrating because I already moved my funds, yet they are stuck and unusable. It causes both financial stress and emotional discomfort, as I cannot access or use what I rightfully own. I request a clear explanation of why this issue occurred and direct guidance on how to resolve it. I also ask Uniswap to ensure smoother transaction processes and better support for users. I urge immediate action to help me regain control of my funds.