From the article:
But six states and parts of four others (including large swaths of Pennsylvania, a crucial swing state in this years race) are more vulnerable because they rely on paperless touchscreen voting, known as DREs or Direct-Recording Electronic voting machines, for which there are no paper ballot backups.
See post 10
This system has been de certified in several states (including IN & CA)
Contact state SOS office if they are not cooperative state RNC should be contacted and encourage to hire legal help