insufficient client permissions (failed on i_channel_join_power)

Hello, If anyone can assist me. I have been using TeamSpeak for a long time and recevied this error tonight when joining a friend's room in the default channel- insufficient client permissions (failed on i_channel_join_power).

If anyone could please offer any advice on a fix, I would greatly appreciate it.

Thanks.

insufficient client permissions (failed on i_channel_join_power)