Anyone use vultr whmcs official module ? Select OS Type" option is freezed

[jsjcjsjc]

the original version is not support WHMCS 8, but I find a fork which works with WHMCS 8
->https://github.com/meramsey/whmcs-vultr/releases/tag/2.0.5

but "Select OS Type" option is freezed and not showing any thing or drop down options,
 

soemone said I should set the Configurable Options, but there is nothing in my side 

Thanks in advance

[DennisHermannsen]

You'll most likely need to add them yourself as a Configurable Option.

[jsjcjsjc]

3 hours ago, DennisHermannsen said:

You'll most likely need to add them yourself as a Configurable Option.

Thanks for your reply. I agree!

 

But Where to found the  parameters  ?  I already  check the document ， there is nothing regarding OS list like the pictures.

 

Someone told me it should be appear automatically ， i just need to choose. But there is nothing in my side

[Martin Soluce]

WE earlier attempted to use the Plugin supplied by vultr but it used to slow down the entire WHMCS, hence we disabled. Does others ever faced such situation for WHMCS module for Vultr?