[TASK] Improve feedback on silent errors from FAL

Errors of this type indicate a problem resolving storage/folder which is not immediately available to report as a proper message about what's actually wrong. A suggestion message is included; there is room for improvement by implementing EXT:easyfal native checks for the consistency of storage and folders.
[TASK] Remove an unnecessary strictly typed argument

This prevents possible problems if the legacy proxy classes are ever removed, improving longevity.
Merge pull request #7 from NamelessCoder/bugs

[TASK] Improve feedback on silent errors from FAL