I downloaded the newest claymore v11.3 for windows and have been trying to mine Worktips on a couple different pools but I keep getting this error message, can anyone help me out with what is causing this ?

Share rejected (281 ms)!
{"id":4,"jsonrpc":"2.0","error":{"code":-1,"message":"lowdifficultyshare"}}

and on some pools I get the   "rejectedshare:invalidresult" error message