500 error as soon as you activate theme.
I found in php error logs a missing class for epsilon-framework. Digging deeper I found all the files missing in the epsilon-framework folder. I did a search and found epsilon-framework on github. I downloaded and pasted these files in the empty folder, and the theme started working for the first time after that. You might want to check your latest release, I created a log-in specifically to let you guys know.
Where I found the fix:
Empty folder where I pasted the files:
/wp-content/themes/tyche/inc/libraries/epsilon-framework