I found exactly the same problem … with debian 10 as operation system I got no problem, but with CentOS 7.9 as well:
see also: computer:2:know > the quick and dirty solution is the same, comment out line 9 in the geomap.php 
I found exactly the same problem … with debian 10 as operation system I got no problem, but with CentOS 7.9 as well:
see also: computer:2:know > the quick and dirty solution is the same, comment out line 9 in the geomap.php