Pubmed export plugin not working OJS 3.4.0.7

Describe the issue or problem
The pubmed export plugin is not working

Steps I took leading up to the issue
For example:

  1. Go to ‘…tools.’
  2. Click on '…pubmed export plug ’
  3. Scroll down to ‘…’
  4. See errorThis page contains the following errors:
    error on line 11 at column 7156: AttValue: " or ’ expected
    Below is a rendering of the page up to the first error.
    Submissions | Nigerian Dental Journal $.pkp = $.pkp || {};$.pkp.app = {“currentLocale”:“en”,“primaryLocale”:“en”,“baseUrl”:“https://nigeriandentaljournal.ng”,“contextPath”:“ndj”,“apiBasePath”:“/api/v1”,“restfulUrlsEnabled”:false,“tinyMceContentCSS”:“https://nigeriandentaljournal.ng/plugins/generic/tinymce/styles/content.css”,“tinyMceOneLineContentCSS”:“https://nigeriandentaljournal.ng/plugins/generic/tinymce/styles/content_oneline.css”,“rtlLocales”:};$.pkp.cons = {“LISTBUILDER_SOURCE_TYPE_TEXT”:0,“LISTBUILDER_SOURCE_TYPE_SELECT”:1,“LISTBUILDER_OPTGROUP_LABEL”:“optGroupLabel”,“REALLY_BIG_NUMBER”:10000,“UPLOAD_MAX_FILESIZE”:“1024M”,“WORKFLOW

    _STAGE_ID_PUBLISHED”:0,“WORKFLOW_STAGE_ID_SUBMISSION”:1,“WORKFLOW_STAGE_ID_INTERNAL_REVIEW”:2,“WORKFLOW_STAGE_ID_EXTERNAL_REVIEW”:3,“WORKFLOW_STAGE_ID_EDITING”:4,“WORKFLOW_STAGE_ID_PRODUCTION”:5,“INSERT_TAG_VARIABLE_TYPE_PLAIN_TEXT”:“PLAIN_TEXT”,“ROLE_ID_MANAGER”:16,“ROLE_ID_SITE_ADMIN”:1,“ROLE_ID_AUTHOR”:65536,“ROLE_ID_REVIEWER”:4096,“ROLE_ID_ASSISTANT”:4097,“ROLE_ID_READER”:1048576,“ROLE_ID_SUB_EDITOR”:17,“ROLE_ID_SUBSCRIPTION_MANAGER”:2097152,“STATUS_QUEUED”:1,“STATUS_PUBLISHED”:3,“STATUS_DECLINED”:4,“STATUS_SCHEDULED”:5};$.pkp.plugins = {};$.pkp.plugins.generic = $.pkp.plugins.generic || {};$.pkp.plugins.generic.tinymceplugin = {“uploadUrl”:“https://nigeriandentaljournal.ng/index.php/ndj/api/v1/_uploadPublicFile”};

What application are you using?
OJS 3.4.0.7

Additional information
Please add any screenshots, logs or other information we can use to investigate this problem.

You should check your PHP error log.