Error resolving template ***, template might not exist or might not be accessible by any of the configured Template Resolvers

it should be easier with some code, but here is a working example with spring boot and Maven.

I have a template called "myTemplate.html" in the folder src/main/resources/templates.

In one of my class I have :

ClassLoaderTemplateResolver templateResolver = new ClassLoaderTemplateResolver();
templateResolver.setSuffix(".html");
templateResolver.setTemplateMode(TemplateMode.HTML);

TemplateEngine templateEngine = new TemplateEngine();
templateEngine.setTemplateResolver(templateResolver);
Context context = new Context();
//... then here i fill all the variables used in my template

String filledTemplate = templateEngine.process("templates/myTemplate", context);

And everything works as expected

Hope it helps a bit :)