'Unity MiniMap not Rendering on Phone

I'm currently doing a little 2D game where you can walk around and interact with things. Unfortunately I encountered a problem. When I made the minimap and tested it, everything went smoothly. Here i tested it on pc in Unity But when i build it to my phone and tested it there i just got this black square instead of my minimap. On my Phone I searched online in stckoverflow and in Unity docs but didn´t find anything. Here the settings from my cameras

My main camera

My MiniMap Camera

And the Settings from the Render Texture



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