[FS#412] WNDR4300 - It is not possible to upload firmware (sysupgrade) by LuCI-LEDE-17.01

[LEDE Bugs]

The following task has a new comment added:

FS#412 - WNDR4300 - It is not possible to upload firmware (sysupgrade) by LuCI-LEDE-17.01
User who did this - Mathias Kresin (mkresin)

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Are you fine with closing the bug and reopen the bug if you have something that might help to identify the real issue?

Without any kind of error message, logfile or similar it is near to impossible to find the underlaying issue.
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=412#comment1364