I can not add comments to a blog and repeatedly get error message: There was an error: Error during processing.
There are also situations where I do not get any error message, but the comment is not shown. The number of comments changes but only until I reload.
Also the Feed icon link gives an error message: Server Error in '/modules2' Application.
Any idea what could be the problem please.
Thanks for your help (the site with the blog is https://community.zeta-producer.com/www.greekwordlink.gr)