How to properly configure rcon server management?

Question

Steam

Hello, based on SourceQuery, I took the Web Admin CS:GO control panel ( https://sourceforge.net/projects/csgowebadmin/)
when connecting to the database, as well as specifying all the data (ip:port and rkon password)
Displays an error , I already broke my head and I don’t know what could be the reason, I connected a more recent library, and danced over the file with tambourines, well, it doesn’t work.
Here is a screen,

If anyone wants to see, ip port and rkon password.
I would be happy with an analogue of such a system (but I did not find it)