404. That’s an error.
The requested URL /add?feedurl=https%3A%2F%2Fgradremstroy.su%2Fspravochnik%2Ftaktika was not found on this server. That’s all we know.
/add?feedurl=https%3A%2F%2Fgradremstroy.su%2Fspravochnik%2Ftaktika