Since you're not getting help from anyone else i suppose i'll come back... I keep getting updates from this thread via email and feel bad for you :(
installing something like user-role-editor was my first thought, but since being able to manage plugins is the main source of your troubles it doesn't make much sense that it would solve your issue. If you don't have the ability to activate plugins, how will installing a plugin help?
first things first: can you get to your wp-config.php file? DO NOT post or sceen shot the contents of this file , but see if there is a line of code that looks like this
i'm beginning to wonder if a) your multisite network was set up correctly or b) if your user level for the network is administrator and not super administrator. multisite setups don't work as single installs do, and based on the troubles you're having, this may be the cause.
let me know first if you have this line in wp-config.php, then we can go from there. but i have a hunch you will need to start from scratch with a fresh install using a step-by-step tutorial for multisite. if i were you, i would
- back up your databases two ways:
- entire database
- JUST post content: wp_posts, wp_meta, etc (everything but your actual settings which probably arn't the issue, but never hurts to be safe)
- try a fresh single install and see if you have the same problems. if not:
- do a fresh multi-site install using detailed instructions on how to properly set up a network for multisite environment
since you are so new at this, how did you get the setup installed in the first place? was it done for you using one of those single-click installs through cpanel?