As an administrator, you can always see the list of projects to administrate, but only via the admin stuff. As a normal user, if you don't have "browse", the project won't appear at all.
So, go to Admin -> All projects and find your lost project in the list, you'll be able to get into the admin pages for it and amend the schemes or users.
If you don't see the project when you click on Projects button, you can try opening it by clicking on the cogwheel icon > Projects.
Please note this will work only if you have administrator rights on the system.
Once you open the project, you'll need to change its permissions so you can then see the issues.
Thanks and regards,
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