

How can I fix this?
This is quite random and i don’t know if anybody would know if theres a way to fix this but anyways, ive been working in making 3d printed chucky dolls, and with my most recent one I sculpted my own head model in nomad sculpt, then imported it into shapr3d, so that I can design an eye socket that fits cleanly with the inside of the eye using the subtraction tool. but for some reason after I did it this time, its been saying “there are invalid bodies in the model which cant be exported”. Ive done this method before and it worked fine, but for the past one the head was from an online 3d printing website if that changed anything. If anybody has any ideas on how I can fix this please let me know, thanks.
Also I am very new to all of this stuff related to this type of stuff, and I know shapr3d is a cad designing app, and not really made for sculpting, bit i don’t know any other way to make these eye sockets without using this app. Ive put images of the models below if anybody would happen to figure out what it is from what it looks,like or something, but either way id really appre someones help