Yes, I am experiencing the same issue with Chameleon / OpenVPN (256bit and 160bit, both) and latest Shibby version 140. I can confirm that VyprVPN is not working yet.
Downgrading to a 1,5 year old firmware is not an option as well for me as there were many fixes (also security fixes) meanwhile.
I am sad because I bought a Tomato-compatible router to get VyprVPN router app. Now I have a router which is not compatible with VyprVPN's implementation or/and not supported by VyprVPN. So I'm in the same situation like before
Regarding official documentation, I agree with @ArthritisEye that it should be updated with a clearly visible warning/information that VyprVPN router app is supported up to Tomato version 132 (Release date: October 2015).
I guess the VyprVPN app should be revisted by developers to adapt their implementation to be compatible with the latest Tomato version(?) again. At least it seems it is working for some VPN services.
@carlosz As you already tried to reach out the Shibby regarding this issue. May you share the link of the issue so I can vote up it. More votes = issue will be fixed earlier (usually).
One more I found while digging. Here one claims that configuration is still working with Shibby 138 when VyprVPN router app is not installed as VyprVPN router app is destroying something. But I would miss the "Per Device VPN" feature. I really appreciate this feature.
I have not tried to follow the manual configuration as described on "VyprVPN OpenVPN Setup for Tomato" without VyprVPN router app installed. But I can confirm: With VyprVPN router app installed it won't work with most recent Shibby version (140) as well. For everyone who is not using "Per Device VPN" at all this solution may be worth it.
* Netgear R7000
* Shibby Version: 140