I have tried disabling Mage24Fix submodule, but it doesn’t let me do it. How to disable it?
The Mage24Fix submodule is a dependent system component for the Improved Layered Navigation extension. As this is a system component, it doesn't have any output on the frontend or in the admin - the aim of the submodule is to provide better compatibility with Magento 2.4 instances. As this is a dependent component, the instance doesn't allow disabling the package separately - it has bounds with the other modules from the package. The submodule is crucial for 2.4 Magento instances, though it might be out of use on Magento 2.3.
In order to disable the submodule, you'd need either to disable the whole package or force the operation. In order to disable the submodule separately, please use the following command:
bin/magento module:disable Amasty_Mage24Fix -f