ok I know what your error is, in this line of your contract you have to change the addres for the addres of the pancke router of the bsc test that it is the following 0xD99D1c33F9fC3444f8101754aBC46c52416550D1
replace this line of code
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02 (0x10ED43C718714eb63d5aA57B78B54704E256024E);
for this line of code
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02 (0xD99D1c33F9fC3444f8101754aBC46c52416550D1);