In the 8th line from bottom of page 108, it is stated that 
A gmPathPriorityVector can be calculated from a received portPriorityVector ...

The word "received" should be removed as portPriorityVectors are not received 
but calculated / updated by information contained in a 
received messagePriorityVector.
It is suggested to follow the wording for RSTP in 
IEEE 802.1Q-2022, clause 13.10 p 520, third clause from bottom of the page.
A root path priority vector for a port can be calculated from a 
port priority vector that contains information from a 
message priority vector