Disappearing Menus

I have done many WP sites, this is the first time I have seen this.

If I actually go into the SETTING I can see all the menus I have made

What “Setting” is this?

Hi, Sorry…
MANAGE THEMES – TWENTY TEN – CUSTOMIZE – NAVIGATION..
you can then see all the menus I have made and choose one.

But you cannot get access to any of these menus from the MENUS page.

https://okanagan-settlement-centre.com

Screen shot here of the menu page
https://okanagan-settlement-centre.com/SS-menus.jpg

Have you tried:

– deactivating all plugins to see if this resolves the problem. If this works, re-activate the plugins one by one until you find the problematic plugin(s).

– switching to the Twenty Eleven theme to rule out any theme-specific problems.

– resetting the plugins folder by FTP or PhpMyAdmin. Sometimes, an apparently inactive plugin can still cause problems.

– re-uploading all files & folders – except the wp-content folder – from a fresh download of WordPress.

I have completely re-installed wordpress, and I don’t have any plugins installed.

I have installed a complete new install on a different domain now,
seems to be a major WP bug!

Same problem.

If it was a major bug, we’d be swamped with reports. As it is, yours is the only one – which suggest that this is specific to your site/server. Try checking your server’s error logs for clues.

Ok

No errors in the logs

Turn debug on and enable error logging to see if that throws anything up.

Getting these messages
WordPress database error: [Got error 28 from storage engine]
SELECT t.*, tt.*, tr.object_id FROM wp_terms AS t INNER JOIN wp_term_taxonomy AS tt ON tt.term_id = t.term_id INNER JOIN wp_term_relationships AS tr ON tr.term_taxonomy_id = tt.term_taxonomy_id WHERE tt.taxonomy IN (‘box-sets’) AND tr.object_id IN (36, 37, 38) ORDER BY t.name ASC

WordPress database error: [Got error 28 from storage engine]
SELECT t.*, tt.*, tr.object_id FROM wp_terms AS t INNER JOIN wp_term_taxonomy AS tt ON tt.term_id = t.term_id INNER JOIN wp_term_relationships AS tr ON tr.term_taxonomy_id = tt.term_taxonomy_id WHERE tt.taxonomy IN (‘feature-sets’) AND tr.object_id IN (39, 40, 41, 42, 43) ORDER BY t.name ASC

WordPress database error: [Got error 28 from storage engine]
SELECT t.*, tt.* FROM wp_terms AS t INNER JOIN wp_term_taxonomy AS tt ON t.term_id = tt.term_id WHERE tt.taxonomy IN (‘nav_menu’) ORDER BY t.name ASC

WordPress database error: [Got error 28 from storage engine]
SELECT t.*, tt.* FROM wp_terms AS t INNER JOIN wp_term_taxonomy AS tt ON t.term_id = tt.term_id WHERE tt.taxonomy IN (‘category’) ORDER BY t.name ASC

Also getting this message now when trying to switch themes..
Warning: Cannot modify header information – headers already sent by (output started at /home/bevchurc/public_html/okanagan-settlement-centre.com/wp-includes/wp-db.php:959) in /home/bevchurc/public_html/okanagan-settlement-centre.com/wp-includes/pluggable.php on line 881

To recap..I can make one menu, move the pages/items around,
but as SOON AS I CLICK ON THE PLUS SIGN to add another menu the menu disappears and everything is greyed out.