Users unable to add or update a description in their listing

For the last month, users have been unable to either add info or update their listing. Has anyone experienced anything similar?

I've checked all the plugins, and they don'tseem to be conflicting with anything.

All advice appreciated!

The site in question is http://www.australianweddingcelebrants.com.au/

 

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Thanks for sorting out so fast - much appreciated!