On all our sites they works with the exception of 1 site. It wipes the whole of the welcome page to joomla after login and displays it as text. We have been through all the modules and plugins systematically and this is is the module that causes this, but it does not cause it on any other site that we have seen so far.
I have also tried to update CB but that update fails.
We have found the issue.. CB does not support PHP 7.1, it only supports 7.0. Once this was applied, it worked. Please can you inform use when PHP 7.1 will be supported. Cheers.