Error installing mariadb on centos 8 droplet

As I follow the tutorial for install mariadb on centos 8 (https://www.digitalocean.com/community/tutorials/how-to-install-mariadb-on-centos-8) the dnf install command has repeatedly failed. The files download but the install fails and I think it’s because of an issue with the signature. I get the following back each time I run the dnf install:

error: /var/cache/dnf/appstream-670736f27949a722/packages/perl-DBI-1.641-4.module_el8+332+132e4365.x86_64.rpm: signature hdr data: BAD, no. of bytes(30020) out of range
error: /var/cache/dnf/appstream-670736f27949a722/packages/perl-IO-Socket-SSL-2.066-4.module_el8+339+1ec643e0.noarch.rpm: signature hdr data: BAD, no. of bytes(11548) out of range
error: /var/cache/dnf/appstream-670736f27949a722/packages/perl-Net-SSLeay-1.88-2.module_el8+339+1ec643e0.x86_64.rpm: signature hdr data: BAD, no. of bytes(28456) out of range
Problem opening package perl-DBI-1.641-4.module_el8+332+132e4365.x86_64.rpm
Problem opening package perl-IO-Socket-SSL-2.066-4.module_el8+339+1ec643e0.noarch.rpm
Problem opening package perl-Net-SSLeay-1.88-2.module_el8+339+1ec643e0.x86_64.rpm
The downloaded packages were saved in cache until the next successful transaction.
You can remove cached packages by executing 'dnf clean packages'.
Error: GPG check FAILED

I’ve done some searching but so far found nothing to help resolve the error. Any guidance would be greatly appreciated.