I'm not sure what the question here is exactly.
If you're trying to modify exchange rates between gold/silver/coppy coins: no, that's not possible.

You're using a bad MariaDB version.
The only supported version for LiF:YO is 5.5 whereas you're using 10.5
This was already discussed here with the same error: viewtopic.php?t=1084

Well your file is invalid xml. You can verify XML syntax with i.e. https://www.truugo.com/xml_validator/ What I figured is a problem with the space characters within the <day> tags. Manually replacing the spaces between <day and id and before season= seems to make the lines work. So whatever is in t...

Hi,
can you please attach the XML file you're trying to upload?

you can't assign multiple Steam IDs to the admin group.
for all other groups you could add one group for each steamID if you need a logging like this

that's not related to feudaltools
contact your server hoster.

your question regarding "two maps" is answered in the FAQ: My custom map has merged with the original default map This happens if you haven’t replaced the terrain files in your server directory and the server uses the original map files. Download the custom map terrain replacer files from ...

hello,
in this case you want to delete the database, boot up the server with no database so it gets recreated, and then start a map deployment.

no

Please share a full server log and your main.cs file.
Note: You can zip files and/or share them trough cloud hosts, such as google drive, onedrive, mega.nz, filestore.to... there are thousands of ways to share files. It's not that hard.