# "Unsupported private key algorithm" at start up **URL:** \ **Category:** Support\ **Created:** [October 13, 2020, 9:47am UTC](https://bisq.community/t/unsupported-private-key-algorithm-at-start-up/9854 "2020-10-13T09:47:50Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Vanityy](https://bisq.community/letter_avatar/vanityy/32/6_22734026db12803ebb3e059622ac3534.png) [@Vanityy](https://bisq.community/u/Vanityy)\ **Post date:** [October 13, 2020, 9:47am UTC](https://bisq.community/t/unsupported-private-key-algorithm-at-start-up/9854/1 "2020-10-13T09:47:50Z")
Hello, I installed Bisq yesterday and everything worked fine. I was able to transfer BTC to my wallet inside Bisq, but I restarted the application and was not able to start it ever since. Here’s a screenshot of the error: ![Screenshot 2020-10-13 at 11.43.24](https://bisq.community/uploads/default/original/2X/6/6df22b13f8fbd1b8ca367798daffe1fbcfd891b6.png) I’m running Bisq 1.3.9 on macOS 10.14.6 and don’t have any VPN, Firewall or Anti-Virus enabled. I already searched for the error and found old threads and GitHub issues, but there seems no solution other than “fixed in next version”. Since I’m running the newest Bisq version and I’m still getting the error I wanted to ask for advice. Thanks. ---
**Author:** ![Bayernator](https://bisq.community/user_avatar/bisq.community/bayernator/32/2515_2.png) [@Bayernator](https://bisq.community/u/Bayernator)\ **Post date:** [October 13, 2020, 2:26pm UTC](https://bisq.community/t/unsupported-private-key-algorithm-at-start-up/9854/2 "2020-10-13T14:26:26Z")
Hmm that is interesting! Have you looked through this thread? [https://github.com/bisq-network/bisq/issues/3304](https://github.com/bisq-network/bisq/issues/3304) If you cannot resolve it by deleting outdated tor files and possibly “Hiddenservice” folder (make sure you have no open trades, this may make you loose you reputation as well, but since you just started that should not be a problem) I would post this in that GitHub thread. Bayer