opencart 2.2 admin login issue

hi,
on my opencart 2.2 everything was working good, until from past 3-4 hours when i login in admin and enter username n password, i am not redirected to dashboard instead i still see login screen but the URL points to the page, can anyone help?

A problem with sessions would cause this, see here:
https://www.antropy.co.uk/blog/opencart ... illing-up/

clearing cache sorted out the problem for me.
still thanks