I am facing this problem which leaves the error message
'Auth' password cannot be read from a file
Because I have set configuration like this in the .opvn file.
And after I googled I found one solution. It says You should recomiple the openVPN. Then I did as it said. It works. Now Go into the openvpn folder. and follow the below.
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./configure --enable-password-save make sudo make install