You have to choose uddeIM from the PMS plugin you use.
Go to your backend, Community Builder administration, plugin management. Now look for ALL pms plugins you have (pms.mypmspro, pms.cbpms) and choose uddeIM 0.5 in these plugins. If uddeIM 0.5 is not available, choose uddeIM 0.4.
Make sure that you choose uddeIM in all plugins, even if they are not published. Some users had problems with this, which probably is a CB problem, but neither beat from CB nor myself were able to reproduce it.
Make sure that at least one of these plugins actually is published.