Wrong Remmina Folder Colors

I installed and used Remmina through apt as an SSH organizer on Ubuntu 18.04. However, suddenly today all of the directory colors change to black whenever I switch to the dark terminal (blue for a white terminal). For a quick update: the original colors (Linux, Tango, Xterm,...) work fine. I have tried to update the Remmina colors through the UI, but everything changes except the directories. It applies to any connection I make, so I am quite sure that is a Remmina problem. When I check at debug console, it yields `(remmina:5815): Vte-CRITICAL **: 12:36:00.368: void vte_terminal_set_colors(VteTerminal*, const GdkRGBA*, const GdkRGBA*, const GdkRGBA*, gsize): assertion 'valid_color(&palette[i])' failed ` whenever I opened a custom color palette.