Themes aren't changing for new sites

I have a multisite installation with 5 sites working.

Everything is working fine, but since last week, every new site I have created for tests purpose I can not change the theme.

I went to main panel and activated the theme for the new subsite.

On the subsite panel, theme management, I can see the "default theme" and the new one available to be activated.
When I clicked "activate" I can read the yellow alert "New Theme activated", but nothing change, the theme wasn't activate.

This happens with any theme in any new site installed (the old ones are working fine, I can change themes etc).

Weird.

  • ImNobodyX
    • WPMU DEV Initiate

    Yes, I have tried with 6 ~7 differentes themes

    The 5 first websites is everything fine, i can install theme and activate only in each of them.
    But for the sixty new site and so, only the default theme works

    EDIT: When I activated the theme on the entire multisite, changing themes for new sites worked.

    Maybe is better I backup everything and do a new clean wordpress multisite installation?

  • aristath
    • Recruit

    @ImNobodyX
    In order for a theme to be activated on a sub-site in a network installation, the theme first has to be network-activated.
    If you have installed your WordPress site using an automated installer then yes, I would advise you to re-install WordPress using the manual installer instead.

    Cheers,
    Ari.

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