Server issues

[superdudeseth]

So The server i play one has recently Updated to the latest version and now ever time i try to join i get this error. "The following muliparts are not installed on is client: pr_100v, pr_f100v" I Did update and ive tried reseting the pack reinstalling the entire launcher and nothing has worked please if you have any information on how to fix it inform me i really want to play this awesome modpack.