My Dashboard won't load on my Android tablet

After modifying my Dashboard on Windows, I can no longer load it on my Samsung Active Tab 3.
When I try to import the .rd file, the screen returns to the default dashboard without displaying any message.
Note that this same .rd file loads fine on my Samsung S9 Plus.
On my tablet, I uninstalled and reinstalled the Realdash app, and logged out and back into my account.
I don’t understand… If you have any ideas or suggestions, I’d love to hear them.
Thanks in advance.

I didn’t quite understand everything, but the problem had to do with forcing multi-window mode on Android.
I disabled Developer Options and re-enabled multi-window mode for Realdash, and now everything is working normally again.
Sorry for the unnecessary posts