message: fixed crashing bug
diff: @@ -97,7 +97,7 @@ import * as genMedia from './gen-media'
  import * as genTable from './gen-tables'
  import * as genXml from './gen-xml'
  -const VERSION = '3.12.0-beta-20220822-2213'
  +const VERSION = '3.12.0-beta-20220823-2150'
  export default class PptxGenJS implements IPresentationProps {
  // Property getters/setters
  @@ -379,7 +379,7 @@ export default class PptxGenJS implements IPresentationProps {
  options.sectionTitle = sectAlreadyInUse ? this.sections[this.sections.length - 1].title : null
  - return this.addNewSlide(options)
  + return this.addSlide(options)
  }
  /**
  