Only free carriers are available

[MynameisJohn]

Delivery methods that were added automatically during module installation are displayed in frontoffice only if "free delivery" is set in the "Shipping locations and costs" section for that specific delivery method. If I set any dependence of the delivery price on the weight or size of the order - they are not available at all. Even in the back office, after a customer places an order, I cannot change their delivery method to one of these methods.

If I select the "free delivery" option in the settings of this delivery method, everything works normally.

I'm already starting to lose my mind trying to solve this problem. Can you help?

Edited July 22, 2020 by MynameisJohn (see edit history)