Add New - The process returned no content - Unknown template

[Atlasfreeman]

So im doing a website. and i put on multi language on the website and uploaded some new images when i decide to make a new page...
This i can't do anymore...

It sais : 

Add New

The process returned no content.

Unknown template.

Well the website is showing fine, but i can't make new pages ?

Do any have any idea what to do?

[gebeer]

Please provide some more information:
- ProcessWire version
- which site profile did you use on installation?
- where did you try to add a new page in the page tree (Home or other page)?
- which templates did you create apart from home and basic-page?
- did you change the 'Family' settings of any of the templates?

It is hard for us to guess all these things. This information will help us to help you.

[Atlasfreeman]

Processwire version:
3.0.123 © 2019

- which site profile did you use on installation?
I used a blank profile

- where did you try to add a new page in the page tree (Home or other page)?
I tried hope and other pages all of them say the same its a fairly small webpage. 

- which templates did you create apart from home and basic-page?
I'm doing a one pager where i use diffrent templates to do diffrent stuff in the flow.
So I have Home , Onecolum, twocolum. and that's it.? Maybe it will be easier to re install. 

- did you change the 'Family' settings of any of the templates?
I don't think so only home said you can't use templates on other pages.

Otherwise look at photo ?

Thanks for helping

[johndoe]

Ok,  now lets see what's in the Family settings in Home template. You have onecolumn and twocolumn templates selected in Allowed templates for children, right?