Cylc 8.0rc1 gui fails due to markupsafe ImportError

Hello,

This is due to a bug in Jinja2 that is beyond our control.

We have pushed a patch to Conda to work around the issue, if you arer installing from PyPi you will need to specify a version for one of the Jinja2 dependencies. Details in the installation section:

https://cylc.github.io/cylc-doc/latest/html/installation.html#admonition-3