Could not find phrase 'invalid_redirect_url_x'.

[ITQalam]

This error is coming when

any member log in to the forum
Could not find phrase 'invalid_redirect_url_x'.
screenshot
137815

[kh99]

I see that phrase in vb4 but not in vb3, so it seems like you have some kind of version mismatch. Which version are you running?

[ITQalam]

I see that phrase in vb4 but not in vb3, so it seems like you have some kind of version mismatch. Which version are you running?
vBulletin? Version 3.8.7

[BirdOPrey5]

Did you install any mods? Maybe a mod for VB4 that doesn't work on VB3?

Disable hooks and see if you still get the error:
https://www.vbulletin.com/forum/showthread.php/196688-Disable-the-plugin-hook-system-globally