Bolsonaro claims there was election fraud in recent Brazilian elections and threatens to cancel the next election if Brazil does not switch to paper ballots.

Brazil should switch to paper ballots, because the current system cannot be properly audited. I have not seen any plausible claims that there has been election fraud, but there could be, and it would be well to eliminate that risk. However, I would not trust Bolsonaro to attempt to make elections honest, and his threat would imply an autogolpe.