Hi dear Moodler;
i am using dedicated server and moodle 3.7. Actually i am facing the problem and it shows me an invalid user as shown in the picture below. being an administrator i have created the sub administrator and today i have deleted the sub administrator and after that it shows me the error invalid user for all users those have access in system defined users and some students also face the same problem. Their dashboard is not loaded. if i will type the manaul path then it used to load the site. for example
mysite/course/index.php
but on clicking dash board it shows again this error.
please help me how to fix this error
