Other email plugins on the site ARE WORKING. Email for Easy Appointments is NOT WORKING. For example; Contact Form 7 email IS WORKING. Please help - I would love to use this plugin if I could just get it to send the email.    
The Easy Appointments plugin form is not sending to the admin email. I get this error:
———— ERROR #7 ————
TYPE: MAIL
ERRORS: {“wp_mail_failed”:[“Could not instantiate mail function.”]}
ERRORS_DATA: {“wp_mail_failed”:{“to”:[“brandspire@bestonecleaning.com”],”subject”:”New Reservation 7″,”message”:”<table border=\”0\” cellpadding=\”15\” cellspacing=\”0\” width=\”500\”>\n <tbody>\n <tr>\n <td style=\”text-align:left; background-color: #CCFFFF;\”>Id<\/td>\n <td style=\”text-align: right; font-weight: bold; background-color: #CCFFFF;\”>7<\/td>\n <\/tr>\n <tr>\n <td style=\”text-align:left;\”>Status<\/td>\n <td style=\”text-align: right; font-weight: bold;\”>pending<\/td>\n <\/tr>\n <tr>\n <td style=\”text-align:left; background-color: #CCFFFF;\”>Location<\/td>\n <td style=\”text-align: right; font-weight: bold; background-color: #CCFFFF;\”>Greater Nashville Area<\/td>\n <\/tr>\n <tr>\n <td style=\”text-align:left;\”>Service<\/td>\n <td style=\”text-align: right; font-weight: bold;\”>Professional Cleaning<\/td>\n <\/tr>\n <tr>\n <td style=\”text-align:left; background-color: #CCFFFF;\”>Worker<\/td>\n <td style=\”text-align: right; font-weight: bold; background-color: #CCFFFF;\”>Lori Gammons<\/td>\n <\/tr>\n <tr>\n <td style=\”text-align:left;\”>Date<\/td>\n <td style=\”text-align: right; font-weight: bold;\”>March 31, 2019<\/td>\n <\/tr>\n <tr>\n <td style=\”text-align:left; background-color: #CCFFFF;\”>Start<\/td>\n <td style=\”text-align: right; font-weight: bold; background-color: #CCFFFF;\”>12:00 pm<\/td>\n <\/tr>\n <tr>\n <td style=\”text-align:left;\”>End<\/td>\n <td style=\”text-align: right; font-weight: bold;\”>1:00 pm<\/td>\n <\/tr>\n <tr>\n <td style=\”text-align:left; background-color: #CCFFFF;\”>Created<\/td>\n <td style=\”text-align: right; font-weight: bold; background-color: #CCFFFF;\”>2019-03-29 19:09:26<\/td>\n <\/tr>\n <tr>\n <td style=\”text-align:left;\”>Price<\/td>\n <td style=\”text-align: right; font-weight: bold;\”>0.00<\/td>\n <\/tr>\n <tr>\n <td style=\”text-align: left; background-color: #CCFFFF;\”>IP<\/td>\n <td style=\”text-align: right; font-weight: bold; background-color: #CCFFFF;\”>73.58.238.44<\/td>\n <\/tr>\n\n <tr>\n\t\t\t\t\t\t\t<td style=\”text-align:left;\”>Name<\/td>\n\t\t\t\t\t\t\t<td style=\”text-align: right; font-weight: bold;\”>Brandy Lee<\/td>\n\t\t\t\t\t\t<\/tr><tr>\n\t\t\t\t\t\t\t<td style=\”text-align:left; background-color: #CCFFFF;\”>Phone<\/td>\n\t\t\t\t\t\t\t<td style=\”text-align: right; font-weight: bold; background-color: #CCFFFF;\”>123-321-12134<\/td>\n\t\t\t\t\t\t<\/tr><tr>\n\t\t\t\t\t\t\t<td style=\”text-align:left;\”>EMail<\/td>\n\t\t\t\t\t\t\t<td style=\”text-align: right; font-weight: bold;\”>bandyvine@yahoo.com<\/td>\n\t\t\t\t\t\t<\/tr><tr>\n\t\t\t\t\t\t\t<td style=\”text-align:left; background-color: #CCFFFF;\”>Description<\/td>\n\t\t\t\t\t\t\t<td style=\”text-align: right; font-weight: bold; background-color: #CCFFFF;\”>Test1<\/td>\n\t\t\t\t\t\t<\/tr> <\/tbody>\n<\/table>\n<p style=\”font-weight: bold\”>- <a href=’http:\/\/bestonecleaning.com?_ea-action=confirm&_ea-app=7&_ea-t=22ed6485912e2087b883f7b2f80534ad’>Confirm appointment<\/a><\/p>\n<p style=\”font-weight: bold\”>- <a href=’http:\/\/bestonecleaning.com?_ea-action=cancel&_ea-app=7&_ea-t=cd7df2c861e64f150b8aec5e73699e06′>Cancel appointment<\/a><\/p>”,”headers”:[],”attachments”:[],”phpmailer_exception_code”:2}}
———- ERROR #7 END ———-