what is this error you are talking about? there is no hashrate to mine a block! or in other words none of the miners are mining bigger blocks on SegWit2x so far that is why there has not been any new blocks there, i am not aware of any bugs.
please explain if i am missing something.

For some reason all btc1/B2X nodes seem stuck at block height 494782 instead of 494783. (The fork was supposed to occur at 494784, so btc1/B2X nodes should have accepted block 494783 as normal.)

tl;dr: @jgarzik's 2x HF just failed due to an off-by-one error, w/ the root cause being the idiotic "activation block must be >1MB" HF logic (already failed before in a similar way on testnet).

Fact is, no competent devs worked on 2x, b/c competent devs know it's a dumb idea.