AdvancedServerList

This is a smaller update that changes how AdvancedServerList reports wrong/invalid conditions when evaluating them.

The new error is now one of two possible structures.

It's either:

[00:00:00 WARN]: [AdvancedServerList] Encountered 1 Error(s) while parsing condition for file 'default.yml':
[00:00:00 WARN]: [AdvancedServerList]   - "Something" == ${invalid placeholder}
[00:00:00 WARN]: [AdvancedServerList]     -> Placeholder '${invalid placeholder}' does not have any available PlaceholderProvider

when no exact location is known or

[00:00:00 WARN]: [AdvancedServerList] Encountered 1 Error(s) while parsing condition for file 'default.yml':
[00:00:00 WARN]: [AdvancedServerList]   - At Position 15:
[00:00:00 WARN]: [AdvancedServerList]     "Something" == ${invalid placeholder}
[00:00:00 WARN]: [AdvancedServerList]                    ^
[00:00:00 WARN]: [AdvancedServerList]     -> Placeholder '${invalid placeholder}' does not have any available PlaceholderProvider

if the location is known.