That's everything from httpd-error.log. Here it is again, using tail -f. Note that the first two entries are from 22:36 yesterday, and then from 07:25 today. These errors came from trying to log in to https://<hostname>/iredadmin, with the web server returning an "internal server error" message:
[Thu Oct 15 22:36:15.758499 2015] [:error] [pid 2949] [remote 75.82.83.187:0] TemplateSyntaxError: non-default argument follows default argument
[Thu Oct 15 22:36:15.758513 2015] [:error] [pid 2949] [remote 75.82.83.187:0]
[Fri Oct 16 07:25:22.003674 2015] [:error] [pid 2949] [remote 75.82.83.187:0] Traceback (most recent call last):
[Fri Oct 16 07:25:22.003787 2015] [:error] [pid 2949] [remote 75.82.83.187:0] File "/usr/local/lib/python2.7/site-packages/web/application.py", line 239, in process
[Fri Oct 16 07:25:22.003798 2015] [:error] [pid 2949] [remote 75.82.83.187:0] return self.handle()
[Fri Oct 16 07:25:22.003806 2015] [:error] [pid 2949] [remote 75.82.83.187:0] File "/usr/local/lib/python2.7/site-packages/web/application.py", line 230, in handle
[Fri Oct 16 07:25:22.003814 2015] [:error] [pid 2949] [remote 75.82.83.187:0] return self._delegate(fn, self.fvars, args)
[Fri Oct 16 07:25:22.003821 2015] [:error] [pid 2949] [remote 75.82.83.187:0] File "/usr/local/lib/python2.7/site-packages/web/application.py", line 420, in _delegate
[Fri Oct 16 07:25:22.003830 2015] [:error] [pid 2949] [remote 75.82.83.187:0] return handle_class(cls)
[Fri Oct 16 07:25:22.003900 2015] [:error] [pid 2949] [remote 75.82.83.187:0] File "/usr/local/lib/python2.7/site-packages/web/application.py", line 396, in handle_class
[Fri Oct 16 07:25:22.003916 2015] [:error] [pid 2949] [remote 75.82.83.187:0] return tocall(*args)
[Fri Oct 16 07:25:22.003956 2015] [:error] [pid 2949] [remote 75.82.83.187:0] File "/usr/local/www/iredadmin/controllers/decorators.py", line 22, in proxyfunc
[Fri Oct 16 07:25:22.003980 2015] [:error] [pid 2949] [remote 75.82.83.187:0] return func(self, *args, **kw)
[Fri Oct 16 07:25:22.004003 2015] [:error] [pid 2949] [remote 75.82.83.187:0] File "/usr/local/www/iredadmin/controllers/mysql/basic.py", line 246, in GET
[Fri Oct 16 07:25:22.004025 2015] [:error] [pid 2949] [remote 75.82.83.187:0] removeQuarantinedInDays=settings.AMAVISD_REMOVE_QUARANTINED_IN_DAYS,
[Fri Oct 16 07:25:22.004048 2015] [:error] [pid 2949] [remote 75.82.83.187:0] File "/usr/local/www/iredadmin/libs/iredbase.py", line 199, in render_template
[Fri Oct 16 07:25:22.004071 2015] [:error] [pid 2949] [remote 75.82.83.187:0] return jinja_env.get_template(template_name).render(context)
[Fri Oct 16 07:25:22.004107 2015] [:error] [pid 2949] [remote 75.82.83.187:0] File "/usr/local/lib/python2.7/site-packages/jinja2/environment.py", line 989, in render
[Fri Oct 16 07:25:22.004134 2015] [:error] [pid 2949] [remote 75.82.83.187:0] return self.environment.handle_exception(exc_info, True)
[Fri Oct 16 07:25:22.004158 2015] [:error] [pid 2949] [remote 75.82.83.187:0] File "/usr/local/lib/python2.7/site-packages/jinja2/environment.py", line 754, in handle_exception
[Fri Oct 16 07:25:22.004181 2015] [:error] [pid 2949] [remote 75.82.83.187:0] reraise(exc_type, exc_value, tb)
[Fri Oct 16 07:25:22.004203 2015] [:error] [pid 2949] [remote 75.82.83.187:0] File "/usr/local/www/iredadmin/libs/../templates/default/macros/general.html", line 1170, in template
[Fri Oct 16 07:25:22.004226 2015] [:error] [pid 2949] [remote 75.82.83.187:0] {% macro display_per_user_wblist(values=[], htmlInputName, label) -%}
[Fri Oct 16 07:25:22.004249 2015] [:error] [pid 2949] [remote 75.82.83.187:0] TemplateSyntaxError: non-default argument follows default argument
[Fri Oct 16 07:25:22.004284 2015] [:error] [pid 2949] [remote 75.82.83.187:0]