@cosmicshelly – If you only installed NextGEN Gallery but did not activate it, I am not sure how it would be affecting your site as you noted it is not active?!
As it is, you should be able to regain access to your site by using an FTP client to rename the /nextgen-gallery/ folder under /wp-content/plugins/ to something else (I tend to add a ~ character to its beginning). Log into your WordPress site, click on the Plugins menu item to insure NextGEN Gallery is not active (if it was you will see an error message, don’t worry about it).
Now you can use your FTP client to re-name the NextGEN Gallery folder back to its default (it will remain deactivated so no worries again).
From here, there could be a plugin conflict going on here or at least it should be ruled out. Have you tried deactivating all of your plugins, clearing your browser cache (and site caches if you are using a caching plugin), then reactivating the NextGEN plugin?
If this fixes the problem then it was likely one of the deactivated plugins that was causing an issue. Now, retrace your steps activating each plugin and re-checking to see if the problem returns. If it does then that last activated plugin was probably the one. Keep reactivating and in most cases it is also best to keep checking after each plugin, sometimes there may be more than one plugin on a site that will create an issue. If you do find one (or more) plugins causing this problem we would greatly appreciate your feedback on them so the developers may address them as soon as they can.
Also to note, in rare cases it may be the theme itself that is causing a conflict so while you have just the NextGEN plugin activated you might consider temporarily switching to one of the default WordPress Twenty series themes and see if this corrects the issue as well.
If the problem still persists after all of this we would still want to know, even more so, as we will still want to sort out the issue and may need additional details.
Thanks!
– Cais.
We could not open the wordpress site at all …just a while page…so my husband used a restore point to bring it back… but I did loose a few posts. I am not savvy with this stuff so your help was a bit over me!! I deleted the NextGen plugin so will just use what came with the version I use. Thanks for your reply.
@cosmicshelly – Sorry for the inconveniences and happy you have your site back.
All the best going forward!
– Cais.
