Unable to change plan from Lightroom CC plan to Photography plan

Hi all,

I've recently subscribed to LR CC plan. Since I'm missing a lot of features (watermark, Merge HDR,...) i would like to switch to Photography plan which includes CC, Classic and PS.

When I click manage plans i get this error:

Unable to load plans

Please try again.

Is there any way to solve this?

Thanks for your help!