You should disable Dump Textures in Emulation>Configuration>Graphics>Advanced Tab → This option is only useful for those that are interested in creating their own custom textures.
You may also want to delete all the textures it’s dumped so far: Go to File>Open Citra Folder, then open up the dump folder and delete the textures folder found here (this will delete all dumped textures for all of your games).
Furthermore, you should disable Accurate Multiplication in Emulation>Configuration>Graphics>Advanced Tab. Older GPUs like yours tend to have issues with it.