file upload fails with error

1

Hi all!
file upload fails with error “unexpected response status code 406”

error code 406
error code 4061253×638 80.3 KB

Who then had such an error?

2
3

error
error1431×746 98.6 KB

tried it in different ways. does not work

4

Check the log files. What browser? Your browser or a proxy could be stripping off the accept header in the request. That could cause the server to throw a 406.

5

Tried different browsers, no result
Loading goes fine if I load .xml in “Vendor Configuration File”
I didn’t find anything in the logs