MyBB Community Forums

Testing my board writing as a guest, getting followed error message:

MyBB has experienced an internal error and cannot continue.

Error Type:
Catchable Fatal Error (4096)
Error Message:
Object of class mysqli_result could not be converted to string
Location:
File: newthread.php(1136) : eval()'d code
Line: 29
Backtrace:
File Line Function
/inc/class_error.php 208 errorHandler->output_error
/newthread.php(1136) : eval()'d code 29 errorHandler->error
/newthread.php 1136 eval
Please contact the MyBB Group for technical support.

URL: http://forum.liber-umbrarum.de

open newthread template in forum admin panel & post code lines 25 - 29

which plugins you have installed ?

PLUGINS

Quote:Einverständnis Nutzungsbedingungen (1.6.1)

Shows Avatar on Threadlist and Forumlist (2.9.6)

Cookie Law (1.0.0)

 
Vorlage für neue Themen (1.0)

Schon gewusst? (1.0.2)
MyBB GoMobile (1.2)

Usergroup Legend (1.2)

Hauspunkte (1.0)

MentionMe (3.2.3)

Anzeigen der Mitglieder in den letzten 24 Stunden (2.0)

OUGC Announcement Bars (1.8.6)
Questsystem (1.0)

Newthread.tpl

<tr>
<td class="trow2" valign="top"><strong>{$lang->your_message}</strong>{$smilieinserter}</td>
<td class="trow2">
<textarea name="message" id="message" rows="20" cols="70" tabindex="2">{$message}{$forum['form']}</textarea>
{$codebuttons}

temporarily disable all plugins & check if it fixes the issue

forum admin panel >> configuration >> General Configuration >> Disable All Plugins --> yes

it works without any plugin

looks like Vorlage für neue Themen is problematic.