external sd – RAM Expander Roehsoft not working on my tablet, how can i fix this?

Hello stackexchange community!

I need some help with expanding RAM of an old android tablet of mine, more specifically, an Genesis GT-7204, using an SD card.

I rooted the tablet already and granted the app RAM Expander from Roehsoft root permissions, but when i try to use the app i get the following message: “This path is not available for swap!”
Image below:enter image description here

The path i used was mnt/local:
enter image description here