@Marylee96
I had this error yestoday and I think it is caused by uncompatible plugins.
I fixed it through banning all of plugins and then active them one by one to find out which plugin made the error. Finally I uninstalled them and fixed.
I can live for now with what we have. I am waiting for 0.7 to be released then I hope my issue will be fixed. I just thought you guys want to know about the issue I am experiencing.
I have several number and string fields in my plugin-rendered page through a custom template edit_info.tpl.
Everything is working fine and wanted to add some validations for the fields before submitting.
What would be the best way to achieve this?