After loggin in as admin, clicking Modules/Payments, a nummer of payment modules is shown.

Normally, these should be 'clickable', after which you can Install/Edit the modules and enable them.

However, when clicking anywhere, they are 'dead', nothing happens.

A number of modules seem to have disappeared as well, No Paypal anymore, which I want to enable now. Even the only payment module active now (the Dutch "Incasso") is not visible, but works.

Has anyone a clue what happened and how to solve this issue?