QMulti_DL_CMD_V2.1 FW upload problems

Hello I am trying to upload newer firmware to Quectel EC21-E devices using QMulti_DL_CMD_V2.1 and I always get following error:

could you help me with this problem?

Hello Mantas_Serpetauskis, thanks for your question
It is recommended to select the mbn file in firehoselp in the update directory to upgrade. For the specific upgrade process, please refer to the linked document, thank you. Quectel_QMulti_DL_CMD_User_Guide_V1.5.pdf (616.2 KB)