Mango router - Can't start PrivateVPN

I successfully downloaded and installed the zip file of ovpn files for PrivateVPN (which I have been using on Windows PCs for a number of years). I then select the desired server (PrivateVPN offers a large number, in different countries). However, when I try to start the connection, the router gives me the following information:

library versions: OpenSSL 1.0.2o 27 Mar 2018, LZO 2.10
Restart pause, 5 second(s)
SIGHUP[soft,init_instance] received, process restarting
Note: option tun-ipv6 is ignored because modern operating systems do not need special IPv6 tun handling anymore.
OpenVPN 2.4.5 mipsel-openwrt-linux-gnu [SSL (OpenSSL)] [LZO] [LZ4] [EPOLL] [MH/PKTINFO] [AEAD]
library versions: OpenSSL 1.0.2o 27 Mar 2018, LZO 2.10
Restart pause, 5 second(s)

and freezes. The only recourse is to abort the connection process.

Clues to resolve this, anyone?

John M

Just to check what opvn files (windows, linux) you have used?

You should NOT use windows ovpn files. You need to use Linux ovpn files.