Font error when sending email with workflow

[phongkni]

I setup send email automatically with workflow, email received font error as attached file.
Only error on iphone devices.
Language is Vietnamese.
How to fix this problem

PS: When opening email to read the details, there is no font error.

[phongkni]

Please help me
Thanks

[joebordes]

I don't have any iphone devices, so I can't do much. You could contact sales (comercial@tsolucio.com), they will be able to dedicate some resources to finding a test environment or working directly with you to solve the issue.