A number of users were locked out of accounts with StarkWare after an upgrade siloed some funds. 

The Ethereum scaling protocol explained that the blockage was due to the 0.12.1 version upgrade last week. Users were advised to perform an "essential" account upgrade months ago, and those who had not upgraded could not access their accounts.

Affected accounts contained a total of $550,000. 

"As of today, the upgrade is reenabled, allowing users to immediately regain access to their accounts," StarkWare said. "For technical reasons, it may take until tomorrow for users of Argent and Braavos to regain access."

Inaccessible funds

StarkWare users had been concerned about the inaccessible funds after the upgrade, with one person saying on social media that it equated to "having …