Send Application Button not working

Hi,
I am using the Wp-job manager Application manager add-on. Whenever the candidate clicks on send application at the(https://weproffer.com/job/) site goes to an error saying This site can’t be reached. The webpage at https://weproffer.com/job/org-janakpur-49-volunteer/ might be temporarily down or it may have moved permanently to a new web address. I may have changed some settings or something went wrong that I quite can’t figure out.

Please help me fix it.

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