Datta Parad

This could be a problem with plugins. Have you recently installed a plugin on the site?

I’d try and go through 1 by 1 and disable them to see if the error disappears.

Please check your .htacess file is writable or not ?

@elliotvs
Hey I mean check the pretty profile Url option from mingle plugin setting not from permalink.

Hello Elliotvs

Please check Pretty Profile Urls in the minlge option from dashbord.
I think that will unselected. please select it.

Hey finally my problem solved.
I enabled the rewrite module from .htacess and changed permalink to Month and name. and now user profile link is working fine
Thanks You.

I also stucked with same problem.