credit plans not being created

hi,
is the "MarketPress integration" add-on compatible with the new MarketPress 3 ?
reason i ask is because "credit plans" are not being created.
what is happening is every time i create a plan in "credit plans" and click save the screen just turns white.
no plans show up but they do show up in "products" (MarketPress) but without the pricing.
i tried adding in the price there (MarketPress) but they still do not show up in "credit plans".
i configured the rules as well as the pages in settings but basically no credit plans are showing both back end (credit plans) or front end (purchase credits).

support access granted if you wanna have a look and its a test/staging site so feel free to trouble shoot and make changes if need be.

your kind assistance and support in this would be greatly appreciated.
regards.