Try this: Go to BotchiefDll folder, copy all files from Geckofx45.0 folder and paste them in BotchiefDll folder and run the bot again. If that doesn't work, make sure Windows 10 is fully up to date. Also, ensure that you update Visual C++ redistributable.
Your firewall settings may also be the reason why you are getting errors. Try disabling your firewall and start the application again.
Due to the fact that there can be a variety of reasons why you are getting this error, many of which we are unable to assist you with, if the above solutions don't work, you will have to use this workaround in order to get the bot to work:
Download VirtualBox VM here: https://www.virtualbox.org/
Watch this video: https://www.youtube.com/watch?v=JT8EXoobjSc and follow the steps to setup a VirtualBox Windows 10 VM.
After that, install google chrome on the VM then download the latest bot to the VM.
Link to download latest bot: https://viewyngspace2.fra1.digitaloceanspaces.com/Downloadables/Steem%20Monsters%20Advanced%20Bot.zip
Start the application by putting in your name, email, and license key.