Enable module - Invalid argument supplied for foreach() in field_attach_load()

I've turned this module on a website and got given this error on everyt page visited.

Warning: Invalid argument supplied for foreach() in field_attach_load() (line 660 of /modules/field/field.attach.inc).

I turned on the devel module to inspect the issue. However the error message disappeared after enabling it. I guess it must have been some sort of cache issue. Up and till enabling a module, I couldn't flush the cache either.

As the website is in development I have no caching activated.