Unable to render 'Numbered Headings' macro An unexpected error has occurred, please create a bug at

[Rameshkumar]

When I am trying to access the confluence page in , one of the page getting as Unable to render 'Numbered Headings' macro
An unexpected error has occurred, please create a bug at https://bitbucket.org/avisi/numbered-headings

[Rameshkumar]

In the Logs I can see below message 

atlassian-confluence.log:2018-10-29 14:21:58,896 WARN [http-nio-8090-exec-6] [plugins.numberedheadings.macro.XHTMLNumberedHeadingsMacro] execute The Numbered Headings plugin threw an unexpected exception...
atlassian-confluence.log: at nl.avisi.confluence.plugins.numberedheadings.macro.parameters.NumberedHeadingsParameterSupport.parseStartNumberingWithParameter(NumberedHeadingsParameterSupport.java:98)
atlassian-confluence.log: at nl.avisi.confluence.plugins.numberedheadings.macro.parameters.NumberedHeadingsParameterSupport.parseParameters(NumberedHeadingsParameterSupport.java:56)