I just updated to the latest version (2.2.7, the git-master branch) and cannot use cdb.sympy.solvers anymore. On the version before, it was working just fine.
I also looked into the solvers.cnb notebook. While dsolve still does it's job, using linsolve causes the kernel to just load endlessly and I have to restart it.
I hope it is not just a problem with my python version, but i get this on two different pcs running on the latest Fedora with Python 3.7.3.