EGmail Calendar Upload error

Keep getting the following error on calndar items created in eMClient

[Google Calendar] Uploading item(s) to folder ‘[email protected]/Calendar’ failed due to the following error: length (‘-1’) must be a non-negative value. (Parameter ‘length’)
Actual value was -1.

Calendar item does get created in in Google calendar.

Thats a very unusual Google Calendar error and nothing about that searching the forum. What version of eM Client are you using ?, & do you have Windows or Mac and what OS ver ?

Also has this only just happened after an update, or has it allways been like that ?

Also are you putting anything specific in the fields when creating the calendar events ?