This is a common issue that happens when you assign users to B2B groups, but the group you assigned them to has no methods for shipping or payments enabled.
Go to B2BKing -> Groups and choose the group that the user is part of. Here you need to enable shipping and payment methods via checkboxes.
Click Save, and that's it!
If you still have issues, feel free to contact us at contact@woocommerce-b2b-plugin.com and we will assist you.
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