Is the site the one linked to in your profile? This looks like a Moodle 3.10 site with the Moove theme which has been upgraded using Softaculous. Softaculous is notorious for breaking sites on upgrade because it leaves behind the source code files that are removed between Moodle versions ("Do NOT copy new files over the old files"). The problem you've reported is exactly this kind of problem.
The fix is to ensure only the source code for the current Moodle version are present, try these steps.