erlang-base64url from home:Leen-Meyer:devel:languages:erlang project
Select Your Operating System
Add repository and install manually
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Leen-Meyer:devel:languages:erlang/15.5/home:Leen-Meyer:devel:languages:erlang.repo zypper refresh zypper install erlang-base64url