I have a simple joomla site setup with the latest joomla 3.8.6 and php 5.3.6 versions.
Such as the Days, Hours, and Minutes function for how long an event will last won't take numbers.
And the Location button pops up a dimmed screen and doesn't nothing else and you have to back out of it. It works completely fine with the default Protostar template.
I would much prefer to use purity iii.
Unfortunately this is on an intranet and not accessible from outside.
The only component I am trying to run on this joomla site is the JCal Pro with the purity viii template so that I can have a simple calendar that allows public/guest editing without logins for the intranet.
I have akeeba backup installed and that's about it.
Again it DOES work fine with the protostar default template.