We have several RSForms that were working fine, but suddenly am getting an error message upon entering any existing form:

An error has occurred.
1054 Unknown column 'FormLayoutFlow' in 'field list'

We use RSforms on all the slaves. Only one site is not working. I reinstalled it through the tools manager in multisites to correspond with the type of installation (share with template)

I also tried an install from within the slave site of the component, and the error that seems to be most relevant is this:

#__rsform_component_type_fields' is not BASE TABLE

This message is due to the fact that you are sharing the RSForm table and that a change occurs in the table structure.
To fix that, you have to drop the shared table and rebuild it.
To rebuild the sharing, you have to Open/Save the slave site definition.
Becarefull that when you do that, if you have added new extension or table or whatever in the "parent" site that is used for the sharing, they will be installed in the slave.
You can use the JMS Tools to compare the tables installed.