Activate a theme via ftp

You can’t active with FTP, as far as I know, but you can disable the theme by simply deleting it or rename the directory name. That way you WP will just go back to default theme.

i renamed it and didn;t work

Your blog still turns op blank? Could you give us a link so we can see what happens?

will that not be considered a cheap advertise? but here it is https://www.blog.fara-critica.ro
Could it be an way to see what theme is curently is activated so i get it replaced. couse i don;t remember his name.

I get a 503 whatever I do. I don’t think it’s a problem with your theme, maybe with the WP install as a whole, or your host, or…

ty anyway..than i will reinstall my wordpres ty so much for your help

503 Service Unavailable
The server is currently unavailable (because it is overloaded or down for maintenance).[2] Generally, this is a temporary state

Check your host first.

it.s nothing with my site it works with others subdomains and forums on it.. is there any way to save my db without it to include the theme so when i install the wordpress the db shoudn;t had anithing with themes
so to save only posts plugins and users without any styles

The database has nothing to do with your theme! WP, themes, plugins, etc. are all software, the database is another part of your hosting where the software puts its info. If you still think it’s WP, just delete the whole install and reinstall it. Leave your database untouched (but it won’t hurt to make a backup) and use the same database, login, etc. in the new wp-config and you’ll have a new WP with the same database.

like i said i made a backup from msql and i need to save it without the line in wich save the actual teme. I saved it like it is blank…what i need to delte to not save anymore my themes.
What i have to backup without themes

You can delete all WP files from your server, as long as you leave the database untouched, nothing can go wrong. Like I said, it doesn’t hurt to make a database backup just to be sure, but such a backup does not include your WP installation. If you have more themes than the one you think causes trouble, I’m sure you have them on your computer? If not, you might want to copy the wp-content folder to your computer before deleting the rest. That’s the folder where themes and plugins are uploaded to. As for all the WP files that come with a download, you can just remove and replace them. Make sure to give the wp-config the same credentials as it has now, so the new WP can ‘talk’ with your old database. If everything works again with the default theme, you can reupload the new themes that you wanted to use, except (of course) the theme that you think caused the problem.

i tried to export the db but it is exported with the actual configuration so with the error that has blank page because of that theme, what table should i skip to not include that theme, i want to save just the content i mean post users. I don;t want plugins and themes.