UPDATE: Just found out that it works fine up to version 5.6 but anything 7.0 and above gives the above error.
Sorry for the issue with the error after updating. You need to find the components that are not working and update it so that it works with the updated version of PHP. If it's a plugin, then you may need to isolate it by turning off plugins completely and then trying to replicate the error as you re-activate them (if you are using plugins). You may also need to turn on debugging in order to get a more explicit error. Or, you may need to speak with a developer to see what's causing the error on your site. Use the options that you have to get a more explicit error that will lead to its cause. When you do so, you'll be able to update if it's available, or remember a component and replace it to keep your site functioning correctly.
If you have any further questions or concerns, please let us know!Kindest Regards,Arnel C.
Customer support service by UserEcho