Because the Java-error suggests something is wrong with the code, let's check the code. Did you change something? Changes outside the block //BEGIN USER CODE and //END USER CODE will be discarded.
If you open your file, F:\Mendix\SafeServices64-main\javasource\emailtemplate\actions\ReplaceEmailTemplateTokens.java You should have something like shown below (starting from line 38). On line 40, the variable this.email should be defined and on line 49 (where the errors occurs) the variable this.email is used.
public Boolean executeAction() throws Exception
{
this.email = __email == null ? null : emailtemplate.proxies.Email.initialize(getContext(), __email);
this.TokenList = new java.util.ArrayList<mxmodelreflection.proxies.Token>();
if (__TokenList != null)
for (IMendixObject __TokenListElement : __TokenList)
this.TokenList.add(mxmodelreflection.proxies.Token.initialize(getContext(), __TokenListElement));
// BEGIN USER CODE
Map<String, ? extends IMendixObjectMember<?>> members = this.email.getMendixObject().getMembers(getContext());
for( Entry<String, ? extends IMendixObjectMember<?>> entry : members.entrySet() ) {
Does this correspond with your code?