problem with running "npm run gen-api-code"

[aldazero]

Hi,
I am trying to run ExplainaBoard_Web locally by following the Quick Start guide, but I am stuck on step 3. When I run the command npm run gen-api-code, I am getting the following error. Do you have any suggestions? Thank you.

Exception in thread "Thread-0" java.lang.RuntimeException: Could not generate api file for 'Default'
	at io.swagger.codegen.v3.DefaultGenerator.generateApis(DefaultGenerator.java:579)
	at io.swagger.codegen.v3.DefaultGenerator.generate(DefaultGenerator.java:782)
	at io.swagger.codegen.v3.cli.cmd.Generate.run(Generate.java:388)
	at java.base/java.lang.Thread.run(Thread.java:1589)
Caused by: com.github.jknack.handlebars.HandlebarsException: /handlebars/pythonFlaskConnexion/param_type.mustache:1:3: java.lang.reflect.InaccessibleObjectException: Unable to make public boolean java.util.Collections$EmptyMap.isEmpty() accessible: module java.base does not "opens java.util" to unnamed module @4d740d85
    /handlebars/pythonFlaskConnexion/param_type.mustache:1:3
	at java.base/java.lang.reflect.AccessibleObject.throwInaccessibleObjectException(AccessibleObject.java:387)
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:363)
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:311)
	at java.base/java.lang.reflect.Method.checkCanSetAccessible(Method.java:201)
	at java.base/java.lang.reflect.Method.setAccessible(Method.java:195)
	at com.github.jknack.handlebars.context.MemberValueResolver.cache(MemberValueResolver.java:82)
	at com.github.jknack.handlebars.context.MemberValueResolver.resolve(MemberValueResolver.java:54)
	at com.github.jknack.handlebars.Context$CompositeValueResolver.resolve(Context.java:199)
	at com.github.jknack.handlebars.internal.path.PropertyPath.eval(PropertyPath.java:52)
	at com.github.jknack.handlebars.Context$PathExpressionChain.next(Context.java:361)
	at com.github.jknack.handlebars.Context$PathExpressionChain.eval(Context.java:381)
	at com.github.jknack.handlebars.Context.get(Context.java:621)
	at com.github.jknack.handlebars.Context$PartialCtx.get(Context.java:165)
	at com.github.jknack.handlebars.internal.Block.merge(Block.java:176)
	at com.github.jknack.handlebars.internal.BaseTemplate.apply(BaseTemplate.java:130)
	at com.github.jknack.handlebars.internal.TemplateList.merge(TemplateList.java:95)
	at com.github.jknack.handlebars.internal.BaseTemplate.apply(BaseTemplate.java:130)
	at com.github.jknack.handlebars.internal.ForwardingTemplate.apply(ForwardingTemplate.java:86)
	at com.github.jknack.handlebars.internal.Partial.merge(Partial.java:228)
	at com.github.jknack.handlebars.internal.BaseTemplate.apply(BaseTemplate.java:130)
	at com.github.jknack.handlebars.internal.TemplateList.merge(TemplateList.java:95)
	at com.github.jknack.handlebars.internal.BaseTemplate.apply(BaseTemplate.java:130)
	at com.github.jknack.handlebars.internal.BaseTemplate.apply(BaseTemplate.java:118)
	at com.github.jknack.handlebars.Options.apply(Options.java:538)
	at com.github.jknack.handlebars.Options.fn(Options.java:433)
	at com.github.jknack.handlebars.helper.IfHelper.apply(IfHelper.java:53)
	at com.github.jknack.handlebars.internal.Block.merge(Block.java:211)
	at com.github.jknack.handlebars.internal.BaseTemplate.apply(BaseTemplate.java:130)
	at com.github.jknack.handlebars.internal.TemplateList.merge(TemplateList.java:95)
	at com.github.jknack.handlebars.internal.BaseTemplate.apply(BaseTemplate.java:130)
	at com.github.jknack.handlebars.internal.BaseTemplate.apply(BaseTemplate.java:118)
	at com.github.jknack.handlebars.Options.apply(Options.java:538)
	at com.github.jknack.handlebars.helper.EachHelper.apply(EachHelper.java:73)
	at com.github.jknack.handlebars.internal.Block.merge(Block.java:211)
	at com.github.jknack.handlebars.internal.BaseTemplate.apply(BaseTemplate.java:130)
	at com.github.jknack.handlebars.internal.TemplateList.merge(TemplateList.java:95)
	at com.github.jknack.handlebars.internal.BaseTemplate.apply(BaseTemplate.java:130)
	at com.github.jknack.handlebars.internal.BaseTemplate.apply(BaseTemplate.java:118)
	at com.github.jknack.handlebars.Options.apply(Options.java:538)
	at com.github.jknack.handlebars.helper.EachHelper.apply(EachHelper.java:73)
	at com.github.jknack.handlebars.internal.Block.merge(Block.java:211)
	at com.github.jknack.handlebars.internal.BaseTemplate.apply(BaseTemplate.java:130)
	at com.github.jknack.handlebars.internal.TemplateList.merge(TemplateList.java:95)
	at com.github.jknack.handlebars.internal.BaseTemplate.apply(BaseTemplate.java:130)
	at com.github.jknack.handlebars.internal.BaseTemplate.apply(BaseTemplate.java:118)
	at com.github.jknack.handlebars.Options.apply(Options.java:538)
	at com.github.jknack.handlebars.helper.EachHelper.apply(EachHelper.java:73)
	at com.github.jknack.handlebars.internal.Block.merge(Block.java:211)
	at com.github.jknack.handlebars.internal.BaseTemplate.apply(BaseTemplate.java:130)
	at com.github.jknack.handlebars.internal.TemplateList.merge(TemplateList.java:95)
	at com.github.jknack.handlebars.internal.BaseTemplate.apply(BaseTemplate.java:130)
	at com.github.jknack.handlebars.internal.BaseTemplate.apply(BaseTemplate.java:118)
	at com.github.jknack.handlebars.Options.apply(Options.java:538)
	at com.github.jknack.handlebars.Options.fn(Options.java:445)
	at com.github.jknack.handlebars.helper.WithHelper.apply(WithHelper.java:58)
	at com.github.jknack.handlebars.internal.Block.merge(Block.java:211)
	at com.github.jknack.handlebars.internal.BaseTemplate.apply(BaseTemplate.java:130)
	at com.github.jknack.handlebars.internal.TemplateList.merge(TemplateList.java:95)
	at com.github.jknack.handlebars.internal.BaseTemplate.apply(BaseTemplate.java:130)
	at com.github.jknack.handlebars.internal.BaseTemplate.apply(BaseTemplate.java:118)
	at com.github.jknack.handlebars.internal.ForwardingTemplate.apply(ForwardingTemplate.java:72)
	at io.swagger.codegen.v3.templates.HandlebarTemplateEngine.getRendered(HandlebarTemplateEngine.java:25)
	at io.swagger.codegen.v3.DefaultGenerator.processTemplateToFile(DefaultGenerator.java:795)
	at io.swagger.codegen.v3.DefaultGenerator.generateApis(DefaultGenerator.java:538)
	... 3 more
Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make public boolean java.util.Collections$EmptyMap.isEmpty() accessible: module java.base does not "opens java.util" to unnamed module @4d740d85
	... 67 more
rm: Dockerfile: No such file or directory
rm: .gitignore: No such file or directory
rm: .travis.yml: No such file or directory
rm: git_push.sh: No such file or directory
rm: tox.ini: No such file or directory
rm: test-requirements.txt: No such file or directory
rm: .dockerignore: No such file or directory
rm: setup.py: No such file or directory