CF7 causing PHP Fatal errors and not working

First, you are using Contact Form 7 version 4.8-dev that is not officially published yet. Rollback it to the current stable release (4.7).

hey Takayuki,
I’ve downloaded and replaced with the official release of the plugin now.. how am I supposed to proceed?
thanks

What other plugins and theme do you use?

Try switching to the default theme and deactivating all other plugins.

I have same problem, checked on default theme and without plugins, it wasn’t help.

Few moments:

1. Site domain is Cyrillic (Domain of the site transforms in special characters, example: xn--h1aaboag0bf.xn--p1ai).
2. Not work just in Mozilla Firefox.

• This reply was modified 7 years, 5 months ago by tgdevpro.
• This reply was modified 7 years, 5 months ago by tgdevpro.
• This reply was modified 7 years, 5 months ago by tgdevpro.

Is any ideas?

• This reply was modified 7 years, 5 months ago by tgdevpro.

Hi all,
is this topic marked as resolved because of the suggested fix?

Try switching to the default theme and deactivating all other plugins.

Thanks

Latest CF7 update (4.9) fixed it for me.