Launch the game from Steam. You don't need Vortex running to launch and play your game. You need Vortex only to install and organize your mods.
While that might be true for most games, for Bannerlord you definitely want to run the game via Vortex so as to skip the game's launcher. That ensures the load order specified in Vortex is loaded by the game.
As for your issue, we would need as much information as possible: what mods are you using? what system are you on? Have you tried switching to fullscreen/windowed mode?
Sorry for the late reply, I am arranging the load order on the launcher as it was in the vortex and playing it. Will this cause problems though? Since I crashed like 2-3 times already.
I was using 3 mods: Fixed launcher, Detailed Character Creation and Full Body Sliders.
My system is windows 10 64 bit.
And no I havent tried to switch to fullscreen/windowed mode. I have been using borderless fullscreen option.