Though initially, when I navigate to AdRotate on the left side menu from the Admin back end in WordPress, I get the option to Manage Adverts even Groups but the only 2 options I get now are: Support and Settings (after upgrade to v5.4.1), which is very strange.
Now I cannot modify the running ads because the options to are no longer available. What do you think is the cause and could be the possible fix?
Sounds like a permissions error.
If you look in Settings > Roles. There should be a bunch of access roles listed.
Make sure they’re set to the right roles and click save.
Even if they’re already set correctly – Clicking save will re-set them anyway.
Roles are commonly messed up when you have a poorly written role manager plugin that doesn’t respect 3rd party roles. If you have a role manager plugin and the problem keeps coming back, consider getting a better/different role manager.