Negative Balance / Unpaid Payouts

Hi,
I'm really trying to understand why my vendors are always getting such notification:
"Your access to the administration panel has been restricted automatically because you have reached the limit of negative account balance or haven't paid a fee for your vendor plan in time.
Your current account balance is -920.95 GBP.
Please pay the marketplace fees — once the payment is processed, your access to the administration panel will be restored automatically."
At this point, I don't know if it is a bug, or is there something I need to configure in the admin panel. (see document attached)
I have no restrictions regarding the number of products a vendor can list on my website or the revenue amount a vendor can get. I just charge a commission for each sale. I just don't understand that negative account balance message.
I've read the documentation regarding this but it does not really explain why vendors are getting that message. I'm just trying to understand why this negative amount keeps going up.
I'm using Multivendor 4.11.5 and Stripe Connect payment. I was expecting Stripe to handle everything related to any payment.
Anybody here could provide some explanation?
Thanks in advance for your response.
Best regards,

Hi,
I'm really trying to understand why my vendors are always getting such notification:
"Your access to the administration panel has been restricted automatically because you have reached the limit of negative account balance or haven't paid a fee for your vendor plan in time.
Your current account balance is -920.95 GBP.
Please pay the marketplace fees — once the payment is processed, your access to the administration panel will be restored automatically."
At this point, I don't know if it is a bug, or is there something I need to configure in the admin panel. (see document attached)
I have no restrictions regarding the number of products a vendor can list on my website or the revenue amount a vendor can get. I just charge a commission for each sale. I just don't understand that negative account balance message.
I've read the documentation regarding this but it does not really explain why vendors are getting that message. I'm just trying to understand why this negative amount keeps going up.
I'm using Multivendor 4.11.5 and Stripe Connect payment. I was expecting Stripe to handle everything related to any payment.
Anybody here could provide some explanation?
Thanks in advance for your response.
Best regards,

forgot the attachment.