Please have a look at the common errors Docs page:
[Docs: Help-Common_Error_Messages]
If you have any other questions about this error, please feel free to reply, including any extra details if necessary such as the link to the error, plugins/modifications installed, and/or a test account.
With regards,
MyBB Support Team
Make sure the file type of the attachment is allowed. Admin CP->Configuration->Attachment Types.
Is your upload directory writable?
Is the file you are trying to upload able to be uploaded here as an attachment?
Yes i tried different extensions jpg gif png even text i cant post
i can post quick replies but this is happening when i am going to create new thread or new reply
Dragon reply please
hello some one reply me to fix this issue