Call to undefined function after upgrading to wp 2.5

That’s a function that is defined inside wp-includes/plugin.php

If there is a copy of that file on your site, delete it, and upload a fresh copy out of the zip.

See if that helps.

it’s solved by uploading again and first deleting indeed

it’s solved by uploading again and first deleting indeed

I tried the same. Did not solve my problem.
I am still getting the error.

Upps/// U just found out that I can not see any error but a BLANK page..please see

https://www.calcuttaglobalchat.net/calcuttablog

Please let me know how to fix the problem.

I am actually log in to the admin panel but I am not seeing any features. check the admin panel screen shot here:
https://calcuttans.com/gallery/main.php?g2_itemId=4847

I’m getting the same problem! Replacing all of the wp-includes files doesn’t help.

My dashboard looks just like bankans’ ??

I had the same problem and admin looked like the picture that bankans posted…but deleteing the plugin.php file and re-uploading fixed it right off. Thanks!

OK, fixed now – I uploaded *everything* again. I think my FTP client was only uploading newer files, and some of the new 2.5 files actually had an older datestamp than those on my server.

well I have fixed the problem somehow but got the same in my other site.
I am WP freak. All my sites (>10) are in WP. All but 2 gave me problem during upgrading so far. both gave me same problem though. with plugin.php and with wp-includes/classes.php on line 241

I will try re uploading everything! and let you all know about my experience.

I am noticing that “speed” for page load time has improved a LOT!

here is my another site which is having problem:
https://ankanbasu.com

while https://coalgeology.com behaving superb.