Send Email to Less than 50 fails when attachment is added
First found this when sending email to event participants.
Find Participants> Event Name =xxx> Send Email Now option
Emails send fine with just text in email body, add an attachemnt and following error message recived
Initially found on live site crm 5.19.4- recreated error on dmaster.demo just now.
Also found similar issue when sending from Find contacts results
Text only- submits without problem- add attachemnt redirected to advanced search with following message
Attachment used in all tests was pptx file.