Hello,
Please re-download the HikashopPayment Stripe Connect plugin.
It looks like you're using the "preferred charge" in "direct" mode but, without a vendor, the result is not a good one.
I change the algorithm in order to not use the "direct" charge when there is no vendor ; it should avoid your issue.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.