First, you have to check if you can still turn or not.
If you can turn but not move, then the passability is wrong (make sure that the first B tile is set to star and check the regular tile passability)
Do not simply change the passability of tiles unless this is the only map that uses that tileset - because you will change the passability for every map that uses that tileset. First check if you accidentally used a wall tile for your floor.
If you cannot turn, then you have an autorun active on the map. You have to find the event or common event that blocks your movement.