manager gives blank screen after login?

hi,

I have a new modx revolution install
started working on it,
added tinyMCE and wayfinder
created some resources, snippets and a template
all works fine.

But now, I try to go to the manager again and it gives me a blank page.
when I try in a diffrent browser it gives me the login screen,
I log in and then again a blank page.

could this be a session problem or something?
maybe my previous session is still pending?

the front-end of the site still works fine btw

hope someont can help? [ed. note: djemmers last edited this post 14 years, 6 months ago.]

I got a blank manager screen after moving from local to live server. (So I don't even get a login screen)

You can see my findings here: https://forums.modx.com/thread/74570/probs-moving-live-manager-blank-content-not-showing

tnx kennybrijs,

I looked at my index.php file in manager and got to this conclusion:
the problem is in line 80:

here the execution stops (the first echo shows but the second doesn't)

any other thoughts anyone? [ed. note: djemmers last edited this post 14 years, 7 months ago.]

I thought I had just now,
I also created new xpdo classes, but that all worked fine
and manager still worked after that.

It seems as if I am logged in but modx doesn't recognize and because of that gives a white screen....

clearing the core/cache file worked!
still dunno why it happened
If it happends again I will reïnvestigate...

It keeps happening,
every time I used the manager
next time I try to go to the manager I get a blank screen
and have to clear the core/cache folder

verry anoying.
any idea's?

my error log in the cache folder:

my error log in cache
[2012-03-01 09:54:18] (ERROR @ /home/content/48/8154648/html/modx/core/model/modx/moduser.class.php : 310) PHP warning: session_regenerate_id() [<a href='function.session-regenerate-id'>function.session-regenerate-id</a>]: Cannot regenerate session id - headers already sent
[2012-03-01 09:54:18] (ERROR @ /home/content/48/8154648/html/modx/core/model/modx/modresponse.class.php : 264) PHP warning: Cannot modify header information - headers already sent by (output started at /home/content/48/8154648/html/modx/manager/index.php:75)

but I don't understand it

aha found it!

seems in my search to fix it I forgot to delete the echo lines I added to index.php in manager
after deleting them and clearing the core/cache folder one more time the manager worked perfectly from then on!

it happend again today after working fine for about 2 weeks...
deleting everything in the core/cache folder fixed it

this is annoying....