Architecture / Installation

I have had issues when upgrading because of php versions. Come to think of it, I recently was playing with 17.1 migrating it to a different domain and upgrading it to 18 and I got a ton of error messages during the db upgrade, I went into my hosting panel and my php was set at 5.6, I set my php to v7.0 and all seemed to go well after that. Just something else to look at. Try changing your php version to 7.