The Find Familiar spell has some cross linking errors, one of which significantly changes the meaning of the spell if Roll20's version is assumed to be accurate. In the sentence "A familiar can't Attack, but it can take other Actions as normal": The word "attack" is capitalized, and links to the "Attack" heading in the "Actions in Combat" section. It is not capitalized in the SRD or PHB, and doing it this way is actively misleading. If the spell were written as transcribed, it would explicitly allow opportunity attacks, Multiattack (for alternate familiars), and any other ways of attacking which were not formally the Attack action. Action links to the "Actions" heading for Tiny Servant, for some reason. Bat, cat, crab, frog (toad), hawk, owl, quipper, rat, and raven don't have links. Owl should definitely have one, if nothing else, since it's the most popular mechanical choice for a familiar. "gaining the benefits of any Special Senses that the familiar": "Special" links to the special property in the weapons table. Attack is similarly linked (twice) in the last sentence even though it's inappropriate, though this is less of an issue.