Workupload I've made updated crack with ur link support, so u can try it now.
This is common problem/error for this engine, sadly unlock isn't possible coz gallery code is heavy encrypted, so only Steam/offline version (after and if it would be released) could have an unlocker (if some user unlock all gallery and share gallery save data file). I have no problems with gallery on Firefox so u either try to change game browser (or to check that current one is not auto clearing cache files on closing and not in incoginto mode), also that ur Windows user is an admin, and user profile folder doesn't have non latin letters, also it could be AV blocking gallery saves but it's very small possibility.