Spectrum OneClick users are not able to log into OneClick if they have the following line in the JRE java.security file on the client system:
jdk.jar.disabledAlgorithms=MD2, MD5, RSA keySize < 2048
Release : Any Spectrum release
Component : SPCOCK - Spectrum OneClick
Spectrum OneClick requires MD5 for signed jar files
Remove MD5 from the dk.jar.disabledAlgorithms parameter in the java.security so it looks like the following:
jdk.jar.disabledAlgorithms=MD2, RSA keySize < 2048