U-boot refersh : "The connection to the server was reset while the page was loading."

My GL-AR300M was running well for one year. But from yesterday it drops the connection continually. Moreover, I cannot access the web interface.

I tried the u-boot to refresh the rom. I can access the u-boot page, but when I clicked the upload file button, the web page immediately shows

“The connection to the server was reset while the page was loading.”

And the router is never reset.

Any suggestion?

Thanks.

Maybe you upload the wrong firmware? Did you download the *.img firmware from GL.iNet download center?

And upload to NAND area?

Hello,
I have the same problem I upgraded to uboot-gl-ar300m-20220216-md5-97ff7bb80cbf129fa21f34ded1559ff8.bin to be able to upload new images.
When I go to 192.168.1.1 I select the image and I go to “upload” I got immediatly “connection reset” and image is not uploaded.

Thank you very much!