Gosh stupid me! I just saw you mentioned the sdcard write protect plugin! Don’t know how I could mix that up with access point feature. I’m very sorry for the confusion!
As far as I heard, the guys are working on it. As of now, it’s rather for players/clients than for servers. I’m like you just a customer (very happy, though) but it might help them understand your specific problem better if you describe your setup. For example, which Max2Play image you installed, on which hardware and which other plugins or software you use that might interfere with SD Card Write Protect. And it’s always good to have a peak at the M2P changelogs here on the website, just to see if they are already addressing a possible bug that shows on your end. I’m sure they will find a solution.