Plugin incompatible with current version

Hello, I’ve been using KeeFox on my Windows desktop and on my old laptop running Linux Mint 18 with no problems for a long time.
Today I’ve installed Linux Mint 19.1 on another laptop, then installed keepass2 following the instructions on the official website, then proceeded to install the KeePassRPC.plgx plugin (in the Plugin directory) but when I open KeePass it gives an error message saying that the plugin is not compatible with current version.
What should I do?

Ok, I have found a solution.
The problem is due to the fact that the KeePassRPC.plgx fails to compile on Linux Mint 19.1 due to a Mono problem. Here are the steps to solve:

  1. Upgrade Mono to the latest available version: go here ->
    and follow the instructions for Ubuntu 18.04

  2. Update the repositories and upgrade mono:
    sudo apt update
    sudo apt upgrade (this will upgrade all the packages that are marked as upgradeable, if you don’t want to upgrade everything you’ll need to update only those you want to)

  3. Install mono-devel:
    sudo apt install mono-devel

Now the plugin works correctly