@Sunshine Adding the `tls-cipher` setting to the OpenVPN config and switching the transport method from UDP->TCP fixed it.

  @pepicheck 

Thank you for the two workarounds. Changing the Legacy settings worked and I'll be trying the second option shortly. This thing was driving me crazy since my Windows client connected fine but Android was being a pain.

Big thanks.

  @GeorgettaCZ For Windows, there is no need to tweak a profile, use the OpenVPN comunity https://openvpn.net/community-downloads/ and make sure, the laptop is not on your home network. OR mobile phone. Not on same network like the router. Connect to mobile hotspot, mobile data plan, and then connect to OpenVPN

@ZCoupon

Hello if just adding

tls-cipher vpn

client asking at least 1 argument

if adding tls-cipher TLS-DHE-RSA-WITH-AES-128-CBC-SHA

also error. i changed to TCP. any more idea ?

**** solution

in advanced setting

Sec level - lagacy

Tlc 1.3 - off

after this works fine 

Udp also works 

  @Sunshine Is there any solution for this error? Neither of the workaround worked for me on ios openvpn app, so it seems on ios your vpn doesn't work.

Thank you

BR

Miklos