I keep having the error "Something went wrong, please try again later"
When you have errors similar to the following
Warning: C_Calendar::loadAllCalendars(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier.
It's likely that the system timezone isn't enabled.
Here's an instruction how to set the timezone in php.ini