Error code: 90404 / File not found -- firmware restoring / upload

Error code: 90404 / File not found -- firmware restoring / upload

Error code: 90404 / File not found -- firmware restoring / upload
Error code: 90404 / File not found -- firmware restoring / upload
Yesterday
Model: Archer MR400  
Hardware Version: V4
Firmware Version: ‪1.4.0 0.9.1 v0001.0 Build 201230 Rel.32867n

 

After removing all SMS from the router, appeared error information:  "Error code: 90404 / File not found". 

I can login to the router with password but after login there is only error message.

Rebooting and resetting doesn't help. 

I though that I can reset or restore firmware with 'Tether' application, but it says that firmware is fine and I cannot do anything. 

 

How to fix it?

 

Error code: 90404 / File not found.

 

 

 

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