im having a problem with the progress bar i uploaded the new zip file like admin requested and installed it properly, now when i go to uplad video i get this message

sorry, uploading files in this format is not allowed, please ensure your file names follow this format

1. entire file cannot exceed 32 characters
2. format should be filename.extention or filename
3. legal characters are 1-9, a-z, A-Z, '_', '-'

everything was working fine untill i decided to try and make the progress bar work, can someone tell me where to start to find my problem

thanks in advance