Hi KHearty
I am sorry that you still having the same error. And sorry for the late response to your post.
I know that you have already do the basic trouble shooting like clearing cache, But can you please try to do it again, and we recommend using Google Chrome. And then try to log back in.
With regards to that issue, that error indicates that a field in that contact card has exceeded the maximum limit. Can you please try to reduce or remove the number of characters in each field one at a time until you identify which field has too many characters and able to change since it doesn't show what field is exactly having an error. I know this is frustrating and makes you upset but this is the only way to check where exactly the fields that is having an error.
I hope this works. Please let me know how you go and if you still need further assistance. I'll be happy to assist.
If my response has answered your inquiry please click "Accept as Solution" to assist other users find this information.
Regards,
Cel