problem with CB Subs Plans

hello,

I just moved sites, including areas (this is perhaps because of this that it gets stuck seen that before it worked very well)

but now if you click on a map, for example:
tarot.voyance-montki.eu/index...plans&plans=10

you arrive on the page correctly, where there is the presentation of the plan and then it gets stuck.
If you click on "buy" instead of the invoice, you come across a page that says:

"Chosen plans combination is not allowed (you must choose coherent plans selection, e.g. mandatory subscription(s) must be active or mandatory plan(s) must be chosen).
Veuillez cliquer sur bouton Retour et choisir le plan souscription vers lequel vous voulez mettre à jour"

Moreover, the translation of the English phrase seems to refer to a subscription when in fact it is a good ...

if anyone can help me, thank you
Phil

in addition, there are problems with the host ... for now, this is the 500 error! So, for this problem mentioned above, I ask you a little patience my sites reappear ...

(mashed mess!)

The error means your plan choice doesn't match the site configuration. My guess is the plan is non-exclusive, while you have other exclusive plans available, which means you need to also provide an exclusive plan to select or it means you've linked to a child plan, but not the parent. In both cases you need to specify more plans in &plans of the URL (e.g. 4-10).