[WARNING @ /privatehost/libraries/libbladeRF/src/board/bladerf2/bladerf2.c:165] FPGA v0.15.0 was detected, which requires firmware v2.5.0 or later. The device firmware is currently v2.4.0. Please upgrade the device firmware before continuing.
But when I go to https://www.nuand.com/fx3_images/ there is no 2.5.0 available. I guessed that perhaps bladeRF_fw_latest.img was secretly 2.5.0, but this doesn't seem to be the case. Where can I find the latest firmware so I can use the latest FPGA bitstream?
Based on the provided information, it appears that the latest available firmware on the Nuand website (https://www.nuand.com/fx3_images/) is version 2.4.0tunnel rush. However, the output from your command indicates that you require firmware version 2.5.0 or later for the FPGA bitstream you are trying to use.