Cannot Access Dev Site


We upgraded our hosted server about 5-6 months ago which involved moving all data from the old to the new server. The live website works fine but for some reason I cannot get into the dev site I made.

When I try to get into the admin panel or storefront for the dev site, it just says "Sorry, service is temporarily unavailable."

Any ideas?

Check page source code (Ctrl + U) to see error message at the bottom

check database password connections

Delete dev cache directory

Thank you for sharing your thought. Actually I am also get stuck in some sort of error and could not come out of it. Please recommend me some appropriate solution that are also very handy to understand.