Try without the custom beaglebone kernel

src/freedombone-image-hardware-setup

 
     # optionally use a separately compiled kernel
     bbb_dtb_file=/usr/lib/$kernelVersion/${bbb_dtb}.dtb
-    if [ -f /boot/bbb.tar.gz ]; then
-        cd /boot
-        tar -xzvf /boot/bbb.tar.gz
-        if [ -f /boot/bbb/dtbs/${bbb_dtb}.dtb ]; then
-            if [ -f /boot/bbb/zImage ]; then
-                bbb_dtb_file=/boot/bbb/dtbs/${bbb_dtb}.dtb
-                vmlinuz=/boot/bbb/zImage
-            fi
-        fi
-    fi
+    #if [ -f /boot/bbb.tar.gz ]; then
+    #    cd /boot
+    #    tar -xzvf /boot/bbb.tar.gz
+    #    if [ -f /boot/bbb/dtbs/${bbb_dtb}.dtb ]; then
+    #        if [ -f /boot/bbb/zImage ]; then
+    #            bbb_dtb_file=/boot/bbb/dtbs/${bbb_dtb}.dtb
+    #            vmlinuz=/boot/bbb/zImage
+    #        fi
+    #    fi
+    #fi
 
     mkdir /tmp/initrd-repack