XF 1.5 Server error after upgrade


Well-known member
Fresh installation of 1.5.1 with few addons. after upgrade I got this server error:
Server Error Log
Error Info
ErrorException: Fatal Error: Class 'XenForo_Dependencies_Public' not found - library/XenForo/CssOutput.php:623
Generated By: Unknown Account, 15 minutes ago
Stack Trace
#0 [internal function]: XenForo_Application::handleFatalError()
#1 {main}
Request State
array(3) {
  ["url"] => string(105) "https://mysite/css.php?css=discussion_list,login_bar,notices,panel_scroller&style=2&dir=LTR&d=1443744000"
  ["_GET"] => array(4) {
    ["css"] => string(48) "discussion_list,login_bar,notices,panel_scroller"
    ["style"] => string(1) "2"
    ["dir"] => string(3) "LTR"
    ["d"] => string(10) "1443744000"
  ["_POST"] => array(0) {
Any idea what's going on?


Well-known member
I've finished the upgrade to 1.5.2, just after the upgrade I've seen that error.
looks everything has been uploaded correctly and fast.
if the problem is some missing class there are some way fix it? everything seems normal anyway.


XenForo moderator
Staff member
Was the error generated during the upload/upgrade or after the upgrade was complete?

If there are files missing you can just get a new upgrade .zip from your customer area and upload the files again.


Well-known member
I saw the error after the upgrade was complete.
that file in library/XenForo/CssOutput.php
seems perfectly uploaded:
Screen shot 2015-10-22 at 6.34.44 PM.png

maybe can I just ignore the error? or reupload everything and re-upgrade again?

Chris D

XenForo developer
Staff member
If you have only received that error once, and since then everything is working ok, it is safe to be ignored.

If that file (which is actually library/XenForo/Dependencies/Public.php) was missing, you'd know about it ;)


Well-known member
That one also is there perfectly uploaded,
Screen shot 2015-10-22 at 7.18.49 PM.png
And after some test everything seems working normally, I'll ignore the error then.;)
Thanks for the great support guys!