Missing header and toolbar after upgrade to 3.3.4

Hello,
after upgrading to 3.3.4 I have lost the header and the global menu toolbar; see

https://indico.ectstar.eu/

Thing is even if I remove the CUSTOMIZATION_DIR and LOGO_URL in the conf file I don’t see the original header nor the menu toolbar.

I guess the customizations are still cached, try to empty the cache.
The other thing to check: If you are using a custon theme extension, then you need to adjust this as well. See e.g. Upgrade and custom theme plugins

I have emptied to no effect.

Not sure I have plugins for the custom theme: My customization (working in 3.2.8) has always been a directory “ECT-indico-theme” to which the CUSTOMIZATION_DIR in the conf file is pointing, which had a simple css file (in the css subdir) with something like:

.toolbar.global-menu { height: 3em; line-height: 3em; padding: 0 0 0 20px; background: #2e2e30; border: none; margin-bottom: 0; }

div.page-header { position: relative; background-color: #1a64a0; width: 100%; }

Even if I remove these lines the header and toolbar do not show.

If I inspect your source then the whole <header></header> block is empty. That is why I believe there is something in a theme/customization.

One more thing: did you restart the indico services after the changes?

Found it. Indeed, there was an header.html in templates which was completely empty (don’t know how/why). Removed and restarted wsgi. Thanks for the help!