vbulletin upgrade from 4 to 5.5.6

[PanterSlo]

I have problem upgrading vBullentin forum from 4 to 5.5.6 version. I done it with upgrade class script and everything went fine, but my admin panel is broken and nothing is working. Also I cannot import new themes. What can I do to successfully upgrade forum?

[Wayne Luke]

Your phrases didn't get imported during the upgrade script. Are you trying to use some alternate language? Do not import a language file from a previous version of vBulletin.

To fix the issue, upload the /core/install directory and run upgrade.php again. This should re-import the default English Language.

[PanterSlo]

This was successfull.. I can now also upload theme to forum... but I can't edit the teme in template manager it throws this error:
Texpand is not defined
at HTMLInputElement.onclick

In console of browser.

[Wayne Luke]

Are you blocking Javascript? vBulletin is built around Javascript.