Hello, 

I see loads of logs like this in the ACP:

 

The datastore folder on the server has access set to 777. I am using the newest IPS version and Data Storage method is set to "File System".

Changing it to MySQL Database caused additional errors:

 

How to fix this?

You would need to contact your hosting company in order to ascertain why things cannot be written to. Thats not really something we would be able to answer