I have a problem, and exactly the problem is the client (website owner).
This is the first time I encounter such a problem and I don't know what I can do to eliminate it.
The message I get when the client tries to log on to the back of the page is: "Reason: Admin Query String" problem. The client cannot log into the backend.
I just don't know why?
The client has a variable IP address, so you have to add new addresses every now and then, which is not convenient.
I found a similar thread on the forum, someone had such a problem once, but I didn't understand anything there. The point is why is this happening? Is the client doing something wrong?
Can you help me?